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


1

Bio-Based Phase Change Materials Research Project | Department of Energy  

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

Based Phase Change Materials Research Based Phase Change Materials Research Project Bio-Based Phase Change Materials Research Project The Department of Energy is currently conducting research into the development of low cost, bio-based phase change materials for building envelopes. Because insulation keeps hot air out inside buildings during the summer and outside during the winter, developing low cost materials can both drive down the cost of insulation and reduce energy costs. Project Description This project seeks to develop a low cost manufacturing process for the production of phase change materials (PCMs), and to subsequently evaluate the PCM pellets produced to provide improved insulation in buildings. Project Partners Research is being undertaken between the Department of Energy, Oak Ridge

2

Theoretical and Experimental Thermal Performance Analysis of Complex Thermal Storage Membrane Containing Bio-Based Phase Change Material (PCM)  

SciTech Connect (OSTI)

Since 2000, an ORNL research team has been testing different configurations of PCM-enhanced building envelop components to be used in residential and commercial buildings. During 2009, a novel type of thermal storage membrane was evaluated for building envelope applications. Bio-based PCM was encapsulated between two layers of heavy-duty plastic film forming a complex array of small PCM cells. Today, a large group of PCM products are packaged in such complex PCM containers or foils containing arrays of PCM pouches of different shapes and sizes. The transient characteristics of PCM-enhanced building envelope materials depend on the quality and amount of PCM, which is very often difficult to estimate because of the complex geometry of many PCM heat sinks. The only widely used small-scale analysis method used to evaluate the dynamic characteristics of PCM-enhanced building products is the differential scanning calorimeter (DSC). Unfortunately, this method requires relatively uniform, and very small, specimens of the material. However, in numerous building thermal storage applications, PCM products are not uniformly distributed across the surface area, making the results of traditional DSC measurements unrealistic for these products. In addition, most of the PCM-enhanced building products contain blends of PCM with fire retardants and chemical stabilizers. This combination of non-uniform distribution and non-homogenous composition make it nearly impossible to select a representative small specimen suitable for DSC tests. Recognizing these DSC limitations, ORNL developed a new methodology for performing dynamic heat flow analysis of complex PCM-enhanced building materials. An experimental analytical protocol to analyze the dynamic characteristics of PCM thermal storage makes use of larger specimens in a conventional heat-flow meter apparatus, and combines these experimental measurements with three-dimensional (3-D) finite-difference modeling and whole building energy simulations. Based on these dynamic tests and modeling, ORNL researchers then developed a simplified one-dimensional (1-D) model of the PCM-enhanced building component that can be easily used in whole-building simulations. This paper describes this experimental-analytical methodology as used in the analysis of an insulation assembly containing a complex array of PCM pouches. Based on the presented short example of whole building energy analysis, this paper describes step-by-step how energy simulation results can be used for optimization of PCM-enhanced building envelopes. Limited results of whole building energy simulations using the EnergyPlus program are presented as well.

Kosny, Jan [ORNL; Stovall, Therese K [ORNL; Shrestha, Som S [ORNL; Yarbrough, David W [ORNL

2010-12-01T23:59:59.000Z

3

Bio-based Thermochromic Intelligent Roof Coating Research Project |  

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

based Thermochromic Intelligent Roof based Thermochromic Intelligent Roof Coating Research Project Bio-based Thermochromic Intelligent Roof Coating Research Project The Department of Energy is conducting research into bio-based thermochromic intelligent roof coatings. The coatings are developed from waste cooking oil. Project Description This project seeks to develop and demonstrate a waste cooking oil-based thermochromic smart roof coating technology that will adjust light transmission in response to temperature changes. This will reduce energy demands for temperature regulation. The project will also study the effects of different oil sources on coating properties. Project Partners This project is being undertaken between the Department of Energy and United Environment & Energy. Project Goals

4

PHASE CHANGE LIQUIDS  

SciTech Connect (OSTI)

Work is being performed to develop a new shipping system for frozen environmental samples (or other materials) that uses an optimal phase change liquid (PCL) formulation and an insulated shipping container with an on-board digital temperature data logger to provide a history of the temperature profile within the container during shipment. In previous work, several PCL formulations with temperatures of fusion ranging from approximately -14 to -20 C were prepared and evaluated. Both temperature of fusion and heat of fusion of the formulations were measured, and an optimal PCL formulation was selected. The PCL was frozen in plastic bags and tested for its temperature profile in a cooler using a digital temperature data logger. This testing showed that the PCL formulation can maintain freezer temperatures (< -7 to -20 C) for an extended period, such as the time for shipping samples by overnight courier. The results of the experiments described in this report provide significant information for use in developing an integrated freezer system that uses a PCL formulation to maintain freezer temperatures in coolers for shipping environmental samples to the laboratory. Experimental results show the importance of the type of cooler used in the system and that use of an insulating material within the cooler improves the performance of the freezer system. A new optimal PCL formulation for use in the system has been determined. The new formulation has been shown to maintain temperatures at < -7 to -20 C for 47 hours in an insulated cooler system containing soil samples. These results are very promising for developing the new technology.

Susan S. Sorini; John F. Schabron

2006-03-01T23:59:59.000Z

5

Next Generation Bio-Based & Sustainable Chemicals Summit  

Broader source: Energy.gov [DOE]

The 6th Annual Next Generation Bio-Based & Sustainable Chemicals Summit will be hosted in New Orleans, Louisiana, from February 3–5.

6

Bio-Based Product Basics | Department of Energy  

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

Bio-Based Product Basics Bio-Based Product Basics Bio-Based Product Basics August 14, 2013 - 1:19pm Addthis Almost all of the products we currently make from fossil fuels can also be made from biomass. These bioproducts, or bio-based products, are not only made from renewable sources, but they also often require less energy to produce than petroleum-based ones. Researchers have discovered that the process for making biofuels also can be used to make antifreeze, plastics, glues, artificial sweeteners, and gel for toothpaste. Other important building blocks for bio-based products are carbon monoxide and hydrogen. When biomass is heated with a small amount of oxygen, these two gases are produced in abundance. Scientists call this mixture biosynthesis gas. Biosynthesis gas can be used to make plastics and acids,

7

Bio-Based Product Basics | Department of Energy  

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

Bio-Based Product Basics Bio-Based Product Basics Bio-Based Product Basics August 14, 2013 - 1:19pm Addthis Almost all of the products we currently make from fossil fuels can also be made from biomass. These bioproducts, or bio-based products, are not only made from renewable sources, but they also often require less energy to produce than petroleum-based ones. Researchers have discovered that the process for making biofuels also can be used to make antifreeze, plastics, glues, artificial sweeteners, and gel for toothpaste. Other important building blocks for bio-based products are carbon monoxide and hydrogen. When biomass is heated with a small amount of oxygen, these two gases are produced in abundance. Scientists call this mixture biosynthesis gas. Biosynthesis gas can be used to make plastics and acids,

8

Laser Crystallization of Phase Change Material  

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

Geoffrey Campbell is the Principal Investigator for Laser Crystallization of Phase Change Material LLNL BES Programs Highlight Laser Crystallization of Phase Change Material False...

9

Phase change material storage heater  

DOE Patents [OSTI]

A storage heater for storing heat and for heating a fluid, such as water, has an enclosure defining a chamber therein. The chamber has a lower portion and an upper portion with a heating element being disposed within the enclosure. A tube through which the fluid flows has an inlet and an outlet, both being disposed outside of the enclosure, and has a portion interconnecting the inlet and the outlet that passes through the enclosure. A densely packed bed of phase change material pellets is disposed within the enclosure and is surrounded by a viscous liquid, such as propylene glycol. The viscous liquid is in thermal communication with the heating element, the phase change material pellets, and the tube and transfers heat from the heating element to the pellets and from the pellets to the tube. The viscous fluid has a viscosity so that the frictional pressure drop of the fluid in contact with the phase change material pellets substantially reduces vertical thermal convection in the fluid. As the fluid flows through the tube heat is transferred from the viscous liquid to the fluid flowing through the tube, thereby heating the fluid.

Goswami, D. Yogi (Gainesville, FL); Hsieh, Chung K. (Gainesville, FL); Jotshi, Chand K. (Gainesville, FL); Klausner, James F. (Gainesville, FL)

1997-01-01T23:59:59.000Z

10

MHK Technologies/bioBase | Open Energy Information  

Open Energy Info (EERE)

bioBase bioBase < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage BioBase.jpg Technology Profile Primary Organization BioPower Systems Pty Ltd Technology Resource Click here Wave Technology Type Click here Seabed mooring system Technology Readiness Level Click here TRL 1 3 Discovery Concept Def Early Stage Dev Design Engineering Technology Description BioPower Systems has developed a novel singular mounting system called bioBASE This system is modeled on the seabed holdfast mechanism used by large sea plants such as the giant kelp In such systems the vertical and lateral loads that are translated to the seabed by the main shaft are re distributed into many smaller elements that engage with the bottom strata This mechanism serves to distribute the forces and alleviate excess loads The bioBASE utilises rockbolting technology for the multiple roots of the system and does not require large specialised vessels or drill rigs due to the small gauge of each bolt

11

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network [OSTI]

H. Manz; "Theory of Phase Change Materials with and withoutand A.K. Sircar; "Phase Change Materials for Heating andmanufacturing of phase change material (PCM) implemented in

Feustel, H.E.

2011-01-01T23:59:59.000Z

12

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network [OSTI]

H. Manz; "Theory of Phase Change Materials with and withoutand A.K. Sircar; "Phase Change Materials for Heating andContaining a Phase Change Material", Proceedings of the 25th

Feustel, H.E.

2011-01-01T23:59:59.000Z

13

Phase Change Memory An Architecture and Systems Perspective  

E-Print Network [OSTI]

#12;Phase Change Memory Store data within phase change material [Ovshinsky68] Set phase via currentPhase Change Memory An Architecture and Systems Perspective Benjamin Lee Computer Architecture lifetime 1 B.Lee et al. "Architecting phase change memory as a scalable DRAM alternative." ISCA-36

Lee, Benjamin C.

14

Project Profile: Innovative Phase Change Thermal Energy Storage...  

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

Phase Change Thermal Energy Storage Solution for Baseload Power Project Profile: Innovative Phase Change Thermal Energy Storage Solution for Baseload Power Infinia logo Infinia,...

15

Phase change thermal energy storage material  

DOE Patents [OSTI]

A thermal energy storge composition is disclosed. The composition comprises a non-chloride hydrate having a phase change transition temperature in the range of 70.degree.-95.degree. F. and a latent heat of transformation of at least about 35 calories/gram.

Benson, David K. (Golden, CO); Burrows, Richard W. (Conifer, CO)

1987-01-01T23:59:59.000Z

16

A review on Phase Change Materials Integrated in Building Walls  

E-Print Network [OSTI]

A review on Phase Change Materials Integrated in Building Walls Fr´ed´eric Kuznika, , Damien Davida review of the integration of phase change materials in building walls. Many considerations are discussed in this paper including physical considerations about building envelop and phase change material, phase change

17

Phase change based cooling for high burst mode heat loads with temperature regulation above the phase change temperature  

DOE Patents [OSTI]

An apparatus and method for transferring thermal energy from a heat load is disclosed. In particular, use of a phase change material and specific flow designs enables cooling with temperature regulation well above the fusion temperature of the phase change material for medium and high heat loads from devices operated intermittently (in burst mode). Exemplary heat loads include burst mode lasers and laser diodes, flight avionics, and high power space instruments. Thermal energy is transferred from the heat load to liquid phase change material from a phase change material reservoir. The liquid phase change material is split into two flows. Thermal energy is transferred from the first flow via a phase change material heat sink. The second flow bypasses the phase change material heat sink and joins with liquid phase change material exiting from the phase change material heat sink. The combined liquid phase change material is returned to the liquid phase change material reservoir. The ratio of bypass flow to flow into the phase change material heat sink can be varied to adjust the temperature of the liquid phase change material returned to the liquid phase change material reservoir. Varying the flowrate and temperature of the liquid phase change material presented to the heat load determines the magnitude of thermal energy transferred from the heat load.

The United States of America as represented by the United States Department of Energy (Washington, DC)

2009-12-15T23:59:59.000Z

18

Tunable hyperbolic metamaterials utilizing phase change heterostructures  

SciTech Connect (OSTI)

We present a metal-free tunable anisotropic metamaterial where the iso-frequency surface is tuned from elliptical to hyperbolic dispersion by exploiting the metal-insulator phase transition in the correlated material vanadium dioxide (VO{sub 2}). Using VO{sub 2}-TiO{sub 2} heterostructures, we demonstrate the transition in the effective dielectric constant parallel to the layers to undergo a sign change from positive to negative as the VO{sub 2} undergoes the phase transition. The possibility to tune the iso-frequency surface in real time using external perturbations such as temperature, voltage, or optical pulses creates new avenues for controlling light-matter interaction.

Krishnamoorthy, Harish N. S.; Menon, Vinod M., E-mail: vmenon@qc.cuny.edu [Department of Physics, Queens College of the City University of New York and Center for Photonic and Multiscale Nanomaterials, Queens, New York 11367 (United States); Department of Physics, Graduate Center of the City University of New York, New York, New York 10016 (United States); Zhou, You; Ramanathan, Shriram [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Narimanov, Evgenii [Birck Nanotechnology Center, School of Computer and Electrical Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

2014-03-24T23:59:59.000Z

19

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft. 3 figs.

Salyer, I.O.

1995-12-26T23:59:59.000Z

20

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and particularly in applications for heat protection for heat sensitive items, such as aircraft flight recorders, and for preventing brake fade in automobiles, buses, trucks and aircraft. 3 figures.

Salyer, I.O.

1994-12-06T23:59:59.000Z

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


21

Life cycle assessment of bio-based ethanol produced from different agricultural feedstocks  

Science Journals Connector (OSTI)

Bio-based products are often considered sustainable due to their renewable nature. However, the environmental performance of products needs to be assessed considering a life cycle perspective to get a complete pi...

Ivan Muńoz; Karin Flury; Niels Jungbluth…

2014-01-01T23:59:59.000Z

22

Round-Robin Test of Paraffin Phase-Change Material  

Science Journals Connector (OSTI)

A round-robin test between three institutes was performed on a paraffin phase-change material (PCM) in the context of the German quality association for phase-change materials. The aim of the quality association ...

S. Vidi; H. Mehling; F. Hemberger; Th. Haussmann…

2014-10-01T23:59:59.000Z

23

Coding-based Energy Minimization for Phase Change Memory  

E-Print Network [OSTI]

-1-4503-1199-1/12/06 ...$10.00. states of the phase-change material. In one state, the ma- terial is amorphous with a highCoding-based Energy Minimization for Phase Change Memory Azalia Mirhoseini Electrical and Computer Phase Change Memory write energy. Our method minimizes the energy required for memory rewrites

24

An analysis of phase change material as thermal mass  

Science Journals Connector (OSTI)

...1006 40 117 An analysis of phase change material as thermal mass M.J Richardson...attenuated by thermal mass. Adding phase change material (PCM) to thermal mass increases...with heavyweight structures. phase change material|thermal mass|energy storage...

2008-01-01T23:59:59.000Z

25

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

Free flowing, conformable powder-like mix of silica particles and a phase change material (pcm) is disclosed. The silica particles have a critical size of about 7[times]10[sup [minus]3] to about 7[times]10[sup [minus]2] microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 10 figures.

Salyer, I.O.

1993-10-19T23:59:59.000Z

26

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

A free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7 [times] 10[sup [minus]3] to about 7 [times] 10[sup [minus]2] microns and the pcm must be added to the silica in an amount of 80 wt. % or less pcm per combined weight of silica and pcm. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a pcm material. The silica-pcm mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 9 figs.

Salyer, I.O.

1992-04-21T23:59:59.000Z

27

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

Free flowing, conformable powder-like mix of silica particles and a phase change material (p.c.m.) is disclosed. The silica particles have a critical size of about 7[times]10[sup [minus]3] to about 7[times]10[sup [minus]2] microns and the p.c.m. must be added to the silica in an amount of 80 wt. % or less p.c.m. per combined weight of silica and p.c.m. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a p.c.m. material. The silica-p.c.m. mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub.

Salyer, I.O.

1993-05-18T23:59:59.000Z

28

Dry powder mixes comprising phase change materials  

DOE Patents [OSTI]

Free flowing, conformable powder-like mix of silica particles and a phase change material (PCM) is provided. The silica particles have a critical size of about 0.005 to about 0.025 microns and the PCM must be added to the silica in an amount of 75% or less PCM per combined weight of silica and PCM. The powder-like mix can be used in tableware items, medical wraps, tree wraps, garments, quilts and blankets, and in cementitious compositions of the type in which it is beneficial to use a PCM material. The silica-PCM mix can also be admixed with soil to provide a soil warming effect and placed about a tree, flower, or shrub. 2 figures.

Salyer, I.O.

1994-02-01T23:59:59.000Z

29

Power generation of a thermoelectric generator with phase change materials  

Science Journals Connector (OSTI)

In this paper, a thermoelectric generator that embeds phase change materials for wasted heat energy harvesting is proposed. The proposed thermoelectric generator embeds phase change materials in its device structure. The phase change materials store large amounts of heat energy using the latent heat of fusion. When the heat source contacts the thermoelectric generator, dissipated heat from the heat source is stored in the phase change materials. When the heat source is removed from the thermoelectric generator, the output power of the thermoelectric generator slowly decreases, while the output power of conventional thermoelectric generators decreases rapidly without the heat source. The additional air layer in the proposed thermoelectric generator disturbs the heat dissipation from the phase change materials, so the thermoelectric generator can maintain the power generation for longer without a heat source. The experimental results for the thermoelectric generator fabricated clearly show the latent heat effect of the phase change materials and the embedded air layer.

Sung-Eun Jo; Myoung-Soo Kim; Min-Ki Kim; Yong-Jun Kim

2013-01-01T23:59:59.000Z

30

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

OF CALIFORNIA RIVERSIDE Phase Change Materials for ThermalOF THE THESIS Phase Change Materials for Thermal Energyto utilize phase change materials (PCM’s) to enhance thermal

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

31

Macroencapsulation of Phase Change Materials for Thermal Energy Storage.  

E-Print Network [OSTI]

??The use of a latent heat storage system using phase change materials (PCMs) is an effective way of storing thermal energy. Latent heat storage enables… (more)

Pendyala, Swetha

2012-01-01T23:59:59.000Z

32

Application of Solar Distillation Systems with Phase Change Material Storage  

Science Journals Connector (OSTI)

This chapter presents the analysis of a solar distillation system with phase change material storage system. There is always a scarcity of...

S. K. Shukla

2014-01-01T23:59:59.000Z

33

A Phase-Change Composite for Use in Building Envelopes  

SciTech Connect (OSTI)

The objective of this project is to develop composite thermal insulations containing phase-change materials for use in the building envelope. The use of a phase-change insulation composite in the building envelope could result in a significant increase in energy efficiency. PhD Research provided candidate phase-change composites, and ORNL performed analytical and experimental evaluations of their thermal performance. The thermal resistance of the prototype panels was somewhat less than that of commercial products, although their thermal capacity was greater. Using these results, PhD Research has been working to modify the design and to produce practical building elements that incorporate phase-change material.

Graves, Ron S. [LMES/ORNL; Stovall, T. K. [LMES/ORNL; Weaver, K. E. [LMES/ORNL; Wilkes, K. E. [LMES/ORNL; Roy, S. [PhD Research Group, Inc.

1992-06-15T23:59:59.000Z

34

MARINE BIODIVERSITY AND CLIMATE CHANGE (MARCLIM) PHASE 2 REPORT  

E-Print Network [OSTI]

MARINE BIODIVERSITY AND CLIMATE CHANGE (MARCLIM) PHASE 2 REPORT SEPTEMBER 2001 - APRIL 2002.................................................................................................. 12 Climate change and its implications for marine biodiversity (Modules 1 & 2 THE MARINE BIOLOGICAL ASSOCIATION IN PARTNERSHIP WITH PLYMOUTH MARINE LABORATORY, SCOTTISH ASSOCIATION

Power, Anne Marie

35

Proceedings of the 8th Pacific Rim Bio-Based Composites Symposium  

E-Print Network [OSTI]

Proceedings of the 8th Pacific Rim Bio-Based Composites Symposium 301 Cellulose Microfibril environmentally safe products because they have many advantages such as renewable, low cost, low density, high to isolate CMNF from the natural fiber cell wall at reasonable cost and low degradation and how to disperse

Wang, Siqun

36

Sneak peek at electrofuels: Geobacter team aims for bio-based solution to solar energy storage  

E-Print Network [OSTI]

Sneak peek at electrofuels: Geobacter team aims for bio-based solution to solar energy storage daily news In Massachusetts, more information about the new category of electrofuels has become available from a research team at University of Massachusetts Amherst. The "Geobacter" team led

Lovley, Derek

37

Heat storage system utilizing phase change materials government rights  

DOE Patents [OSTI]

A thermal energy transport and storage system is provided which includes an evaporator containing a mixture of a first phase change material and a silica powder, and a condenser containing a second phase change material. The silica powder/PCM mixture absorbs heat energy from a source such as a solar collector such that the phase change material forms a vapor which is transported from the evaporator to the condenser, where the second phase change material melts and stores the heat energy, then releases the energy to an environmental space via a heat exchanger. The vapor is condensed to a liquid which is transported back to the evaporator. The system allows the repeated transfer of thermal energy using the heat of vaporization and condensation of the phase change material.

Salyer, Ival O. (Dayton, OH)

2000-09-12T23:59:59.000Z

38

Phase-change radiative thermal diode  

SciTech Connect (OSTI)

A thermal diode transports heat mainly in one preferential direction rather than in the opposite direction. This behavior is generally due to the non-linear dependence of certain physical properties with respect to the temperature. Here we introduce a radiative thermal diode which rectifies heat transport thanks to the phase transitions of materials. Rectification coefficients greater than 70% and up to 90% are shown, even for small temperature differences. This result could have important applications in the development of future contactless thermal circuits or in the conception of radiative coatings for thermal management.

Ben-Abdallah, Philippe, E-mail: pba@institutoptique.fr [Laboratoire Charles Fabry, UMR 8501, Institut d'Optique, CNRS, Université Paris-Sud 11, 2, Avenue Augustin Fresnel, 91127 Palaiseau Cedex (France)] [Laboratoire Charles Fabry, UMR 8501, Institut d'Optique, CNRS, Université Paris-Sud 11, 2, Avenue Augustin Fresnel, 91127 Palaiseau Cedex (France); Biehs, Svend-Age, E-mail: s.age.biehs@uni-oldenburg.de [Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg (Germany)] [Institut für Physik, Carl von Ossietzky Universität, D-26111 Oldenburg (Germany)

2013-11-04T23:59:59.000Z

39

Evaluation of phase change materials for reconfigurable interconnects  

E-Print Network [OSTI]

The possible use of programmable integrated circuit interconnect vias using an indirectly heated phase change material is evaluated. Process development and materials investigations are examined. Devices capable of multiple ...

Khoo, Chee Ying

2010-01-01T23:59:59.000Z

40

Latent Heat or Phase Change Thermal Energy Storage  

Science Journals Connector (OSTI)

It has been explained in sections 1.6 and 1.6.2 how phase change materials (PCM) have considerably higher thermal energy storage densities compared to sensible heat storage materials and are able to absorb or rel...

H. P. Garg; S. C. Mullick; A. K. Bhargava

1985-01-01T23:59:59.000Z

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


41

Small Scale SOFC Demonstration Using Bio-Based and Fossil Fuels - Technology Management, Inc.  

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

Small Scale SOFC Demonstration Using Small Scale SOFC Demonstration Using Bio-based and Fossil Fuels-Technology Management, Inc. Background In this congressionally directed project, Technology Management, Inc. (TMI) will develop and demonstrate a residential scale prototype solid oxide fuel cell (SOFC) system at end-user sites. These small-scale systems would operate continuously on either conventional or renewable biofuels, producing cost effective, uninterruptible

42

Crystallization of Ge2Sb2Te5 nanometric phase change material clusters made by gas-phase condensation  

E-Print Network [OSTI]

Crystallization of Ge2Sb2Te5 nanometric phase change material clusters made by gas- phase=pdfcov Published by the AIP Publishing Articles you may be interested in Nanoscale nuclei in phase change materials phase change material clusters made by gas-phase condensation G. E. Ghezzi,1,2 R. Morel,3 A. Brenac,3 N

Paris-Sud XI, Université de

43

How do rewritable DVDs work? Optical properties of phase-change materials  

E-Print Network [OSTI]

How do rewritable DVDs work? Optical properties of phase-change materials W. Welnic,1,2 Silvana;Outline 1 Introduction to Phase Change Materials (PCMs) 2 Open questions for Phase Change Materials;Introduction to Phase Change Materials (PCMs) Outline 1 Introduction to Phase Change Materials (PCMs) 2 Open

Botti, Silvana

44

Simplified Numerical Description of Latent Storage Characteristics for Phase Change Wallboard  

E-Print Network [OSTI]

H. Manz; "Theory of Phase Change Materials with and withoutand A.K. Sircar; "Phase Change Materials for Heating andContaining a Phase Change Material", Proceedings of the 25th

Fuestel, H.E.

2011-01-01T23:59:59.000Z

45

Nanoscale gap filling for phase change material by pulsed deposition and inductively coupled plasma etching  

Science Journals Connector (OSTI)

The gap filling of phase change material has become a critical module in the fabrication process of phase change random access memory (PCRAM) as the ... . We achieved void free gap filling of phase change material

W. C. Ren; B. Liu; Z. T. Song; X. Z. Jing; B. C. Zhang; Y. H. Xiang…

2013-09-01T23:59:59.000Z

46

Phase-change-related degradation of catalyst layers in  

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

Phase-change-related degradation of catalyst layers in Phase-change-related degradation of catalyst layers in proton-exchange-membrane fuel cells Title Phase-change-related degradation of catalyst layers in proton-exchange-membrane fuel cells Publication Type Journal Article Year of Publication 2013 Authors Hwang, Gi Suk, Hyoungchul Kim, Roger Lujan, Rangachary Mukundan, Dusan Spernjak, Rodney L. Borup, Massoud Kaviany, Moo Hwan Kim, and Adam Z. Weber Journal Electrochimica Acta Volume 95 Pagination 29 - 37 Date Published 4/2013 ISSN 00134686 Keywords degradation, Environmental scanning electron microscope (ESEM), Freeze/thaw cycle, Membrane electrode assembly (MEA), Nanostructured thin film (NSTF), Pt/C dispersion Abstract Understanding and optimizing water and thermal management in the catalyst layer of proton-exchange-membrane fuel cells is crucial for performance and durability improvements. This is especially the case at low temperatures, where liquid water and even ice may exist. In this article, the durability of a traditional Pt/C dispersed and a nanostructure thin film (NSTF) membrane-electrode assembly (MEA) are examined under wet/dry and freeze/thaw cycles using both in situ and ex situ experiments. Multiple isothermal cold starts result in a performance degradation for the dispersed MEA, while no such a degradation is found in the NSTF. The results are consistent with stand-alone MEA tests, wherein the dispersed catalyst layer results in an exponential increase in the number and size of cracks until it delaminates from the membrane due to the impact of the freeze/thaw process within the catalyst-layer pores. The NSTF catalyst layer shows minimal crack generation without delamination since the ice forms on top of the layer. The results are useful for understanding degradation due to phase-change containing cycles.

47

Lattice Boltzmann method for colloidal dispersions with phase change  

Science Journals Connector (OSTI)

Colloidal dispersions are known to undergo phase transition in a number of processes. This often gives rise to formation of structures in a flowing medium. In this paper, we present a model for flow of a colloidal dispersion with phase change. Two distribution functions are used. The colloid is described as a non-ideal fluid capable of phase change, but rather than taking the dispersion medium as the second fluid, a better choice is the dispersion (water plus colloid) which can be considered as an incompressible fluid. This choice allows a standard Lattice Boltzmann (LB) model for incompressible fluids to be used in combination with for the 'free-energy' LB model for the colloid. The coupling between the two fluids is the drag force on the colloid and the dependence of the viscosity of the overall fluid on the particle volume fraction. The problems raised by characteristic times and lengths have been treated. The main application considered is the growth dynamics or domain structuration of protein dispersions during dead-end filtration on a membrane surface.

B. Piaud; M.J. Clifton; S. Blanco; R. Fournier

2008-01-01T23:59:59.000Z

48

A System-level Scheme for Resistance Drift Tolerance of a Multilevel Phase Change Memory  

E-Print Network [OSTI]

of a phase change material such as GTS tends to drift over time. The change in resistance severely degradesA System-level Scheme for Resistance Drift Tolerance of a Multilevel Phase Change Memory Pilin presents a system-level scheme to alleviate the effect of resistance drift in a multilevel phase change

Han, Jie

49

E-Print Network 3.0 - allotropic phase change Sample Search Results  

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

Summary: temperature phase and can change more o r less suddenly during the phase transition. Since the microscopical... FRICTION ASSOCIATED WITH THE ALLOTROP'IC TRANSFORMATION...

50

Opportunities to Apply Phase Change Materials to Building Enclosures Webinar  

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

1, 2011 1, 2011 Opportunities to Apply Phase Change Materials to Building Enclosures Welcome to the Webinar! We will start at 2:00 PM Eastern Time Be sure that you are also dialed into the telephone conference call: Dial-in number: 888-950-6757; Pass code: 6420234 1 | Building America Program www.buildingamerica.gov Building America: Introduction November 11, 2011 Chuck Booten Chuck.Booten@nrel.gov Building Technologies Program 2 | Building America Program www.buildingamerica.gov * Reduce energy use in new and existing residential buildings * Promote building science and systems engineering / integration approach * "Do no harm": Ensure safety, health and durability are maintained or improved

51

Polymeric compositions incorporating polyethylene glycol as a phase change material  

DOE Patents [OSTI]

A polymeric composition comprising a polymeric material and polyethylene glycol or end-capped polyethylene glycol as a phase change material, said polyethylene glycol and said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g; the composition is useful in making molded and/or coated materials such as flooring, tiles, wall panels and the like; paints containing polyethylene glycols or end-capped polyethylene glycols are also disclosed.

Salyer, Ival O. (Dayton, OH); Griffen, Charles W. (Mason, OH)

1989-01-01T23:59:59.000Z

52

Analysis of Lipoplex Structure and Lipid Phase Changes  

SciTech Connect (OSTI)

Efficient delivery of genetic material to cells is needed for tasks of utmost importance in the laboratory and clinic, such as gene transfection and gene silencing. Synthetic cationic lipids can be used as delivery vehicles for nucleic acids and are now considered the most promising nonviral gene carriers. They form complexes (lipoplexes) with the polyanionic nucleic acids. A critical obstacle for clinical application of the lipid-mediated DNA delivery (lipofection) is its unsatisfactory efficiency for many cell types. Understanding the mechanism of lipid-mediated DNA delivery is essential for their successful application, as well as for a rational design and synthesis of novel cationic lipoid compounds for enhanced gene delivery. A viewpoint now emerging is that the critical factor in lipid-mediated transfection is the structural evolution of lipoplexes within the cell, upon interacting and mixing with cellular lipids. In particular, recent studies showed that the phase evolution of lipoplex lipids upon interaction and mixing with membrane lipids appears to be decisive for transfection success: specifically, lamellar lipoplex formulations, which were readily susceptible to undergoing lamellar-nonlamellar phase transition upon mixing with cellular lipids and were found rather consistently associated with superior transfection potency, presumably as a result of facilitated DNA release. Thus, understanding the lipoplex structure and the phase changes upon interacting with membrane lipids is important for the successful application of the cationic lipids as gene carriers.

Koynova, Rumiana

2012-07-18T23:59:59.000Z

53

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

PHASE CHANGE THERMAL ENERGY STORAGE FOR CONCENTRATING SOLARChange Materials for Thermal Energy Storage in ConcentratedChange Materials for Thermal Energy Storage in Concentrated

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

54

SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage  

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

Encapsulated Phase Change Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants to someone by E-mail Share SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants on Facebook Tweet about SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants on Twitter Bookmark SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants on Google Bookmark SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants on Delicious Rank SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants on Digg Find More places to share SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants on

55

Investigation of a hyperbranched polyurethane as a solid-state phase change material  

Science Journals Connector (OSTI)

As phase change material (PCM), doped hyperbranched polyurethane (D- ... and chain extender as hard segment. This material’s molecular structure, phase change behaviors, thermal-resistant property, and crystallin...

Li Liao; Qi Cao; Hongqing Liao

2010-05-01T23:59:59.000Z

56

E-Print Network 3.0 - advanced phase change Sample Search Results  

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

phase change Search Powered by Explorit Topic List Advanced Search Sample search results for: advanced phase change Page: << < 1 2 3 4 5 > >> 1 273:739-746, 1997.Am J Physiol Regul...

57

Microencapsulation of octadecane as a phase-change material by interfacial polymerization in an emulsion system  

Science Journals Connector (OSTI)

?Microcapsules containing phase-change material for thermal adaptable fiber application were synthesized ... emulsion system. Octadecane was used as a phase-change material and NP-10 which is nonionic surfactant,...

Jeong-Sook Cho; Aehwa Kwon; Chang-Gi Cho

2002-03-01T23:59:59.000Z

58

Phase Change Characteristics of a Nanoemulsion as a Latent Heat Storage Material  

Science Journals Connector (OSTI)

The primary objective of this study was to investigate the fundamental phase change characteristics of a nanoemulsion using differential scanning ... point than water, was utilized as the phase change material fo...

Koji Fumoto; Noriaki Sato; Masahiro Kawaji…

2014-10-01T23:59:59.000Z

59

Study on the heat conduction of phase-change material microcapsules  

Science Journals Connector (OSTI)

The 3? approach was used to measure the effective thermal conductivity of phase-change material microcapsules (PCMMs) based on urea formaldehyde ... PCMMs with different densities were measured within the phase-change

Gangtao Zhao; Xiaohui Xu; Lin Qiu; Xinghua Zheng; Dawei Tang

2013-06-01T23:59:59.000Z

60

Melting intercalation method to prepare lauric acid/organophilic montmorillonite shape-stabilized phase change material  

Science Journals Connector (OSTI)

A kind of novel shape-stabilized phase change material (SSPCM) was prepared by using a ... made of lauric acid (LA) as a phase change material and organophilic montmorillonite (OMMT) as a support material. And th...

Meizhu Chen ???; Shaoping Zheng; Shaopeng Wu…

2010-08-01T23:59:59.000Z

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


61

From concept to application. A new phase change material for thermal protection at -11 °C  

Science Journals Connector (OSTI)

Molecular Alloys as Phase Change Materials (MAPCM) offer opportunities in the fields ... storage and thermal protection, where the classic Phase Change Materials (PCM) don't exist or they ... find. The MAPCM's a...

Lourdes Ventolŕ; Teresa Calvet…

2002-12-01T23:59:59.000Z

62

Thermal conductivity enhancement of Ag nanowires on an organic phase change material  

Science Journals Connector (OSTI)

One of the greatest challenges in the application of organic phase change materials (PCMs) is to increase their thermal conductivity while maintaining high phase change enthalpy. 1-Tetradecanol/Ag nanowires compo...

J. L. Zeng; Z. Cao; D. W. Yang; L. X. Sun…

2010-07-01T23:59:59.000Z

63

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

E-Print Network [OSTI]

of Science and Technology Press, 1996. [2] J.Kelly kissock, J Michael Hannig, Thomas I. Whitney et al. Early results from testing phase change wallboard, IEA Annex10? phase change materials and chemical reactions for thermal energy storage first...

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

2006-01-01T23:59:59.000Z

64

Long-Term Changes in Gas- and Particle-Phase Emissions from On...  

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

Changes in Gas- and Particle-Phase Emissions from On-Road Diesel and Gasoline Vehicles Long-Term Changes in Gas- and Particle-Phase Emissions from On-Road Diesel and Gasoline...

65

Thermal Energy Storage of Polyester Fabric Coated with Paraffin Liquid as Microencapsulated Phase Change Material (PCM)  

Science Journals Connector (OSTI)

This research work involves the production of microencapsulated phase change material (PCM) in which paraffin liquid was...

A. B. M. Dom; A. F. Mohd; N. Tulos; E. Nasir…

2014-01-01T23:59:59.000Z

66

Preparation and thermal properties of expanded graphite/paraffin/organic montmorillonite composite phase change material  

Science Journals Connector (OSTI)

Expanded graphite (EG)/paraffin/organic montmorillonite (OMMT) composite phase change material (PCM) was prepared by using melt...

Hongtao Kao; Min Li; Xuewen Lv; Jinmiao Tan

2012-01-01T23:59:59.000Z

67

Study of tunable negative index metamaterials based on phase-change materials  

Science Journals Connector (OSTI)

The tunable optical response of elliptical nanohole arrays penetrating through metal–phase change material–metal...

Cao, Tun; Simpson, Robert E; Cryan, Martin J

2013-01-01T23:59:59.000Z

68

MULTI-PHASE FRACTURE-MATRIX INTERACTIONS UNDER STRESS CHANGES  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multiphase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (1) developing the direct experimental measurements of fracture aperture and topology using high-resolution x-ray microtomography, (2) modeling of fracture permeability in the presence of asperities and confining stress, and (3) simulation of two-phase fluid flow in a fracture and a layered matrix. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. The distribution of fracture aperture is a difficult issue that we are studying and developing methods of quantification. The difficulties are both numerical and conceptual. Numerically, the three-dimensional data sets include millions, and sometimes, billions of points, and pose a computational challenge. The conceptual difficulties derive from the rough nature of the fracture surfaces, and the heterogeneous nature of the rock matrix. However, the high-resolution obtained by the imaging system provides us a much needed measuring environment on rock samples that are subjected to simultaneous fluid flow and confining stress. Pilot multi-phase experiments have been performed, proving the ability to detect two phases in certain large fractures. The absolute permeability of a fracture depends on the behavior of the asperities that keep it open. A model is being developed that predicts the permeability and average aperture of a fracture as a function of time under steady flow of water including the pressure solution at the asperity contact points. Several two-phase flow experiments in the presence of a fracture tip were performed in the past. At the present time, we are developing an inverse process using a simulation model to understand the fluid flow patterns in the presence of a fracture, and the interactions between fluid flow in the fracture and the adjacent matrix. Preliminary results demonstrate that the flow patterns are significantly impacted by the presence of the fracture. Bypassing is quantified and we expect to be able to extract from the modeling the distribution of properties in the fracture and the adjacent matrix.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarado; H. Yasuhara; A. Alajmi; Z. Karpyn

2002-10-28T23:59:59.000Z

69

Unravelling the atomic structure of AgInSbTe phase change materials: Theoretical perspective  

E-Print Network [OSTI]

E*PCOS2011 Unravelling the atomic structure of AgInSbTe phase change materials: Theoretical-GST. Key words: phase change materials, Ag/In/Sb/Te alloys, density functional, molecular dynamics 1. INTRODUCTION Phase change (PC) materials are chalcogenide alloys that switch very rapidly between the amorphous

70

Density functional simulations of Tebased phase change materials J. Akola 1,2  

E-Print Network [OSTI]

E*PCOS2008 Density functional simulations of Tebased phase change materials J. Akola 1,2 and R. O limitations of the theoretical methods are discussed. Key words: Phase change materials, density functional. This is extremely difficult in practice, and our first calculations on phase change materials were carried out

71

On the Penetration of the 660 km Phase Change by Mantle Downflows  

E-Print Network [OSTI]

in an upward force which resists the passage of the downwelling through the phase change. Cold material piles up and spreads lat- erally on the phase-change boundary. Eventu- ally, enough cold materialOn the Penetration of the 660 km Phase Change by Mantle Downflows David Bercovici Department

72

Materials World Network: Phase change materials for nanoelectronics: A combinatorial approach to mechanistic understanding  

E-Print Network [OSTI]

Materials World Network: Phase change materials for nanoelectronics: A combinatorial approach protocols for CME. The US-based researchers will focus on development of new chalcogenide phase change-resolved probes to correlate these parameters with structural, electronic and phase- change properties. This CME

Olmstead, Marjorie

73

Study on the melting and solidification in a glass block containing a phase change material  

E-Print Network [OSTI]

Study on the melting and solidification in a glass block containing a phase change material.virgone@insa-lyon.fr and kevy.johannes@insa-lyon.fr Abstract This paper presents an experimental analysis of a phase change the phenomenon of phase change in an enclosure, focusing the research on the role of natural convection in liquid

Paris-Sud XI, Université de

74

Optimization of a Phase Change Heat Sink for Extreme Environments Jason Leland and Gerald Recktenwald  

E-Print Network [OSTI]

-levelling in an electrical power grid. Here we consider a different application of a phase change heat sink: as the primaryOptimization of a Phase Change Heat Sink for Extreme Environments Jason Leland and Gerald--Results of numerical optimization are reported for a phase change heat sink used to cool electronic equipment in ex

Recktenwald, Gerald

75

Thermal Performance of Phase-Change Wallboard for Residential Cooling  

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

6 6 Thermal Performance of Phase-Change Wallboard for Residential Cooling Cooling residential buildings in milder climates contributes significantly to peak demand mainly because of poor load factors. Peak cooling load determines the size of equipment and the cooling source. Several measures reduce cooling-system size and allow the use of lower-energy cooling sources; they include incorporating exterior walls or other elements that effectively shelter interiors from outside heat and cold, and providing thermal mass, to cool interior spaces during the day by absorbing heat and warm them at night as the mass discharges its heat. Thermal mass features may be used for storage only or serve as structural elements. Concrete, steel, adobe, stone, and brick all satisfy requirements

76

Clothing temperature changes of phase change material-treated warm-up in cold and warm environments  

Science Journals Connector (OSTI)

The purpose of this study was to investigate the appropriate amounts of phase change materials to give objective and subjective wear sensations. ... much higher temperature than in WR. Saliva change did not appea...

Kyeyoun Choi; Hyejin Chung; Boram Lee; Kyunghee Chung; Gilsoo Cho…

2005-12-01T23:59:59.000Z

77

Using Encapsulated Phase Change Salts for Concentrated Solar Power Plant  

Science Journals Connector (OSTI)

Abstract Storing thermal energy as latent heat of fusion in phase change material (PCM), such as inorganic salt mixtures, can improve the energy density by as much as 50% while reducing the cost by over 40%. However, to discharge stored energy from PCMs, which has low thermal conductivity, requires a large heat transfer area which drives up the cost. Fortunately, salts encapsulated into small capsules can provide high specific surface area thus alleviating this problem. However, a technical barrier with encapsulating salts is that when it is produced, a void must be created inside the shell to allow for expansion of salt when it is heated above its melting point to 550 °C. Terrafore's method to economically create this void consists of using a sacrificial polymer which is coated as the middle layer between the salt prill and the shell material. The polymer is selected such that it decomposes much below the melting point of salt to gas leaving a void in the capsule. Salts with different melting points are encapsulated using the same recipe and contained in a packed bed consisting of salts with progressively higher melting points from bottom to top of the tank. This container serves as a cascaded energy storage medium to store heat transferred from the sensible heat energy collected in solar collectors. Mathematical models indicate that over 90% of salt in the capsules undergo phase change improving energy density by over 50% from a sensible-only thermal storage. Another advantage of this method is that it requires only a single tank as opposed to the two-tanks used in a sensible heat storage, thereby reducing the cost from a nominal $27 per kWht to $16 per kWht and coming close to the SunShot goal for thermal storage of $15 per kWht.

A. Mathur; R. Kasetty; J Oxley; J Mendez; K. Nithyanandam

2014-01-01T23:59:59.000Z

78

Metabolic engineering of Escherichia coli: A sustainable industrial platform for bio-based chemical production  

Science Journals Connector (OSTI)

Abstract In order to decrease carbon emissions and negative environmental impacts of various pollutants, more bulk and/or fine chemicals are produced by bioprocesses, replacing the traditional energy and fossil based intensive route. The Gram-negative rod-shaped bacterium, Escherichia coli has been studied extensively on a fundamental and applied level and has become a predominant host microorganism for industrial applications. Furthermore, metabolic engineering of E. coli for the enhanced biochemical production has been significantly promoted by the integrated use of recent developments in systems biology, synthetic biology and evolutionary engineering. In this review, we focus on recent efforts devoted to the use of genetically engineered E. coli as a sustainable platform for the production of industrially important biochemicals such as biofuels, organic acids, amino acids, sugar alcohols and biopolymers. In addition, representative secondary metabolites produced by E. coli will be systematically discussed and the successful strategies for strain improvements will be highlighted. Moreover, this review presents guidelines for future developments in the bio-based chemical production using E. coli as an industrial platform.

Xianzhong Chen; Li Zhou; Kangming Tian; Ashwani Kumar; Suren Singh; Bernard A. Prior; Zhengxiang Wang

2013-01-01T23:59:59.000Z

79

MULTI-PHASE FRACTURE-MATRIX INTERACTIONS UNDER STRESS CHANGES  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multiphase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (a) developing the direct experimental measurements of fracture aperture and topology and fluid occupancy using high-resolution x-ray micro-tomography, (b) quantifying the effect of confining stress on the distribution of fracture aperture, and (c) characterization of shear fractures and their impact on multi-phase flow. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. Several fractures have been scanned and the fracture aperture maps have been extracted. The success of the mapping of fracture aperture was followed by measuring the occupancy of the fracture by two immiscible phases, water and decane, and water and kerosene. The distribution of fracture aperture depends on the effective confining stress on the nature of the rock and the type and distribution of the asperities that keep the fracture open. Fracture apertures at different confining stresses were obtained by micro-tomography covering a range of about two thousand psig. Initial analysis of the data shows a significant aperture closure with increase in effective confining stress. Visual descriptions of the process are shown in the report while detailed analysis of the behavior of the distribution of fracture aperture is in progress. Both extensional and shear fractures are being considered. The initial multi-phase flow tests were done in extensional fractures. Several rock samples with induced shear fracture are being studies, and some of the new results are presented in this report. These samples are being scanned in order to quantify the distribution of apertures and the nature of the asperities. Low resolution images of fluids in a sample with a shear fracture were performed and they provide the confidence that flow patterns and saturations could be determined in the future. A series of water imbibition tests were conducted in which water was injected into a fracture and its migration into the matrix was monitored with CT and DR x-ray techniques. The objective is to understand the impact of the fracture, its topology and occupancy on the nature of mass transfer between the matrix and the fracture. Counter-current imbibition next to the fracture was observed and quantified, including the influence of formation layering.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarado; A. Alajmi; Z. Karpyn; N. Mohammed; S. Al-Enezi

2005-06-15T23:59:59.000Z

80

Thermal performance of phase change wallboard for residential cooling application  

SciTech Connect (OSTI)

Cooling of residential California buildings contributes significantly to electrical consumption and peak power demand mainly due to very poor load factors in milder climates. Thermal mass can be utilized to reduce the peak-power demand, downsize the cooling systems, and/or switch to low-energy cooling sources. Large thermal storage devices have been used in the past to overcome the shortcomings of alternative cooling sources, or to avoid high demand charges. The manufacturing of phase change material (PCM) implemented in gypsum board, plaster or other wall-covering material, would permit the thermal storage to become part of the building structure. PCMs have two important advantages as storage media: they can offer an order-of-magnitude increase in thermal storage capacity, and their discharge is almost isothermal. This allows the storage of high amounts of energy without significantly changing the temperature of the room envelope. As heat storage takes place inside the building, where the loads occur, rather than externally, additional transport energy is not required. RADCOOL, a thermal building simulation program based on the finite difference approach, was used to numerically evaluate the latent storage performance of treated wallboard. Extended storage capacity obtained by using double PCM-wallboard is able to keep the room temperatures close to the upper comfort limits without using mechanical cooling. Simulation results for a living room with high internal loads and weather data for Sunnyvale, California, show significant reduction of room air temperature when heat can be stored in PCM-treated wallboards.

Feustel, H.E.; Stetiu, C.

1997-04-01T23:59:59.000Z

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


81

Multi-Phase Fracture-Matrix Interactions Under Stress Changes  

SciTech Connect (OSTI)

The main objectives of this project are to quantify the changes in fracture porosity and multi-phase transport properties as a function of confining stress. These changes will be integrated into conceptual and numerical models that will improve our ability to predict and optimize fluid transport in fractured system. This report details our progress on: (a) developing the direct experimental measurements of fracture aperture and topology and fluid occupancy using high-resolution x-ray micro-tomography, (b) counter-current fluid transport between the matrix and the fracture, (c) studying the effect of confining stress on the distribution of fracture aperture and two-phase flow, and (d) characterization of shear fractures and their impact on multi-phase flow. The three-dimensional surface that describes the large-scale structure of the fracture in the porous medium can be determined using x-ray micro-tomography with significant accuracy. Several fractures have been scanned and the fracture aperture maps have been extracted. The success of the mapping of fracture aperture was followed by measuring the occupancy of the fracture by two immiscible phases, water and decane, and water and kerosene. The distribution of fracture aperture depends on the effective confining stress, on the nature of the rock, and the type and distribution of the asperities that keep the fracture open. Fracture apertures at different confining stresses were obtained by micro-tomography covering a range of about two thousand psig. Initial analysis of the data shows a significant aperture closure with increase in effective confining stress. Visual and detailed descriptions of the process are shown in the report. Both extensional and shear fractures have been considered. A series of water imbibition tests were conducted in which water was injected into a fracture and its migration into the matrix was monitored with CT and DR x-ray techniques. The objective was to understand the impact of the fracture, its topology and occupancy on the nature of mass transfer between the matrix and the fracture. Counter-current imbibition next to the fracture was observed and quantified, including the influence of formation layering. A group of Shear fractures were studied, with layers perpendicular and parallel to the main axis of the sample. The structures of the fractures as well as their impact on absolute permeability and on oil displacement by water were evaluated. Shear fractures perpendicular to the layers lead to a wide distribution of pores and to an overall increase in absolute permeability. Shear fractures parallel to the layers lead to an overall increase in absolute permeability, but a decrease in displacement efficiency. This DoE project funded or partially funded three Ph.D. and four M.Sc. students at the Pennsylvania State University. The results from the research have yielded several abstracts, presentations and papers. Much of the work is still in the process of being published.

A.S. Grader; D. Elsworth; P.M. Halleck; F. Alvarao; A. Alajmi; Z. Karpyn; N. Mohammed; S. Al-Enezi

2005-12-07T23:59:59.000Z

82

Investigation of a selective switching device using a phase-change material for a 3-dimensional PCRAM array  

Science Journals Connector (OSTI)

A selective switching device utilizing a phase-change material was investigated. In this work, we ... selective switching and memory operation in a multiple phase-change memory with only phase-change materials wi...

Jung Min Lee; Yun-Heub Song; Yuta Saito…

2013-05-01T23:59:59.000Z

83

Performance of Thermal Insulation Containing Microencapsulated Phase Change Material  

SciTech Connect (OSTI)

The objective of this study is dynamic thermal performance microencapsulated phase change material (PCM) blended with loose-fill cellulose insulation. Dynamic hot-box testing and heat-flux measurements have been made for loose-fill cellulose insulation with and without uniformly distributed microencapsulated PCM. The heat flux measurements were made with a heat-flow-meter (HFM) apparatus built in accordance with ASTM C 518. Data were obtained for 1.6 lb{sub m}/ft{sup 3} cellulose insulation containing 0 to 40 wt% PCM. Heat-flux data resulting from a rapid increase in the temperature on one side of a test specimen initially at uniform temperature were analyzed to access the effect of PCM on total heat flow. The heat flux was affected by the PCM for about 100 minutes after the temperature increase. The total heat flow during this initial period decreased linearly with PCM content from 6.5 Btu/ft{sup 2} at 0% PCM to 0.89 Btu/ft{sup 2} for 40 wt% PCM. The cellulose insulation with PCM discharged heat faster than the untreated cellulose when the hot-side temperature of the test specimen was reduced. In addition, hot-box apparatus built in accordance with ASTM C 1363 was utilized for dynamic hot-box testing of a wood stud wall assembly containing PCM-enhanced cellulose insulation. Experimental data obtained for wood-frame wall cavities containing cellulose insulation with PCM was compared with results obtained from cavities containing only cellulose insulation.

Kosny, Jan [ORNL] [ORNL; Yarbrough, David [R & D Services] [R & D Services; Syed, Azam M [ORNL] [ORNL

2007-01-01T23:59:59.000Z

84

Femto-second laser fabrication of phase change material nanostructures for novel applications  

Science Journals Connector (OSTI)

In this paper, we will demonstrate our recent results of laser lithography of nanostructures of phase change material for novel nanophotonic application.

Tseng, Ming Lun; Chu, Cheng Hung; Chang, Chia Min; Lin, Wei Chih; Chu, Nien-Nan; Mansuripur, Masud; Liu, Ai Qun; Tsai, Din Ping

85

Development of Thermo-Regulating Fabric Using Phase Change Material (PCM).  

E-Print Network [OSTI]

?? This research study concentrates on use of phase change material (PCM) in textiles which can produce thermo-regulating characteristics to control body temperature useful for… (more)

Bhatkhande, Prasad S.

2011-01-01T23:59:59.000Z

86

Flow frictional characteristics of microencapsulated phase change material suspensions flowing through rectangular minichannels  

Science Journals Connector (OSTI)

An experimental investigation was conducted on the laminar flow frictional characteristics of suspensions with microencapsulated phase change material (MEPCM) in water flowing through rectangular...

Yu Rao; Frank Dammel; Peter Stephan…

2006-08-01T23:59:59.000Z

87

Theoretical analysis of convective heat transfer enhancement of microencapsulated phase change material slurries  

Science Journals Connector (OSTI)

...This paper analyzes the convective heat transfer enhancement mechanism of microencapsulated phase change material slurries based on the analogy between convective ... addition, the conventional Nusselt number ...

Yinping Zhang; Xianxu Hu; Xin Wang

2003-12-01T23:59:59.000Z

88

Reversible Switching of an Optical Gate Using Phase-Change Material and Si Waveguide  

Science Journals Connector (OSTI)

Optical gate switch that uses Ge2Sb2Te5phase-change material was fabricated and the reversible switching has been...

Ikuma, Yuichiro; Shoji, Yuya; Kuwahara, Masashi; Wang, Xiaomin; Kintaka, Kenji; Kawashima, Hitoshi; Tanaka, Daiki; Tsuda, Hiroyuki

89

Numerical Investigation on the Heat Transfer Enhancement Using Micro/Nano Phase-Change Particulate Flow.  

E-Print Network [OSTI]

??The introduction of phase change material fluid and nanofluid in micro-channel heat sink design can significantly increase the cooling capacity of the heat sink because… (more)

Xing, Keqiang

2007-01-01T23:59:59.000Z

90

Phase-change optical recording materials based on GeSb  

Science Journals Connector (OSTI)

GeSb based materials are investigated for phase-change optical recording. Physical properties and amorphization / crystallization behavior are determined. Recording characteristics are...

Dimitrov, Dimitre

91

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants.  

E-Print Network [OSTI]

??Experimental studies are presented that aim to utilize phase change materials (PCM's) to enhance thermal energy storage systems for concentrated solar thermal power (CSP) systems.… (more)

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

92

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

on Sustainable thermal Energy Storage Technologies, Part I:2009, “Review on Thermal Energy Storage with Phase Change2002, “Survey of Thermal Energy Storage for Parabolic Trough

Coso, Dusan

2013-01-01T23:59:59.000Z

93

Micro/Nano-Scale Phase Change Systems for Thermal Management and Solar Energy Conversion Applications  

E-Print Network [OSTI]

Thermal Energy Storage,” Renewable and Sustainable EnergyReview on Sustainable thermal Energy Storage Technologies,Energy Storage Using Phase Change Materials,” Renewable and Sustainable Energy

Coso, Dusan

2013-01-01T23:59:59.000Z

94

Energy density and volume expansion in solid-liquid phase change, for energy applications.  

E-Print Network [OSTI]

?? Phase change materials (PCMs) have long been studied as thermal energy storage media. However, the Swedish company, Exencotech AB, reaching beyond this usual scope… (more)

Pan, Ruijun

2013-01-01T23:59:59.000Z

95

Phase change materials for limiting temperature rise in building integrated photovoltaics  

Science Journals Connector (OSTI)

Elevated operating temperatures reduce the solar to electrical conversion efficiency of photovoltaic devices. This paper presents an experimental evaluation of phase change materials for thermal management of photovoltaic devices. Two particular phase change materials were used to moderate the temperature rise of photovoltaics. The thermal performance of different internal fin arrangements for improving bulk PCM thermal conductivity are presented. Using RT25 with internal fins, the temperature rise of the PV/PCM system can be reduced by more than 30 °C when compared with the datum of a single flat aluminium plate during phase change. Phase change materials are shown to be an effective means of limiting temperature rise in photovoltaic devices.

M.J. Huang; P.C. Eames; B. Norton

2006-01-01T23:59:59.000Z

96

Structural phase transitions on the nanoscale: The crucial pattern in the phase-change materials Ge2Sb2Te5 and GeTe  

E-Print Network [OSTI]

Structural phase transitions on the nanoscale: The crucial pattern in the phase-change materials Ge; published 4 December 2007 Phase-change materials are of immense importance for optical recording-increasing demands on the density, speed, and stability of memory. Phase-change PC materials already play impor- tant

97

Density functional simulations of phase change materials: disordered phases of Ge8Sb2Te11 and Ag/In/Sb/Te alloys  

E-Print Network [OSTI]

E*PCOS2009 Density functional simulations of phase change materials: disordered phases of Ge8Sb2Te75.0Te17.7 (AIST). These represent two families used widely as phase change materials: pseudobinary and more flexible than those of Ag. Key words: Phase change materials, density functional calculations

98

2D cognitive optical data processing with phase change materials  

Science Journals Connector (OSTI)

We demonstrate high-density, multi-level crystallization of a Ge2Sb2Te5 thin film using tightly focused femtosecond laser pulses. The optical reflectivity in each distinct phase states...

Wang, qian; Maddock, Jonathan; Rogers, Edward T; Roy, Tapashree; Craig, Christopher; MacDonald, Kevin F; Hewak, Dan; Zheludev, Nikolay I

99

Micro and nanostructured surfaces for enhanced phase change heat transfer  

E-Print Network [OSTI]

Two-phase microchannel heat sinks are of significant interest for thermal management applications, where the latent heat of vaporization offers an efficient method to dissipate large heat fluxes in a compact device. However, ...

Chu, Kuang-Han, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

100

Anomalous thermal conduction characteristics of phase change composites with single walled carbon nanotube inclusions  

E-Print Network [OSTI]

of the phase change materials, because low thermal conductivity hinders the rate of energy storage and release of the new way of improving the thermal conductivity of phase change materials by seeding nano materials way to manipulate the thermal conductivity of nano composites using one dimensional nano material

Maruyama, Shigeo

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


101

Graphene-enhanced hybrid phase change materials for thermal management of Li-ion batteries  

E-Print Network [OSTI]

Graphene-enhanced hybrid phase change materials for thermal management of Li-ion batteries incorporation leads to significant decrease in the temperature rise in Li-ion batteries. Graphene leads September 2013 Keywords: Battery Thermal management Graphene Phase change material a b s t r a c t Li

102

SunShot Initiative: Encapsulated Phase Change Material in Thermal Storage  

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

Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants Terrafore logo Photo of gray balls grouped together. 10 to 15 millimeter capsules provide high heat transfer surface. Terrafore, under the Baseload CSP FOA, is developing novel encapsulated phase change materials (PCM) for use in thermal storage applications to significantly reduce the LCOE for baseload CSP plants. Approach Terrafore is determining a cost-effective way to produce small 10 mm to 15 mm capsules containing phase change material (PCM salt) in a suitable shell material. Large numbers of these PCM capsules provide high-heat transfer surface and store heat as sensible and latent heat of fusion of salt. The capsules with different PCMs inside the shell are stacked inside a single tank to provide a cascaded storage to effectively use the latent heat of fusion of salts over the solar collection temperature range.

103

Modeling a solar energy collector with an integrated phase-change material  

E-Print Network [OSTI]

In this thesis, a finite-element computer model was created to simulate a solar air heater with an integrated-phase change material. The commercially available finite element package ADINA-Fluid was used to generate the ...

Guerra, Alexander Adrian

2009-01-01T23:59:59.000Z

104

XAFS Study of Phase-Change Recording Material Using Actual Media  

Science Journals Connector (OSTI)

The influence of the interface layer to the local structure for atomic arrangement of a GeBiTe phase-change material was investigated by using XAFS on the actual rewritable HD DVD...

Nakai, Tsukasa; Yoshiki, Masahiko; Satoh, Yasuhiro

105

Real Time Control of a Shuttle Phase Change Material Experiment Using Flight Correlated Algorithms  

Science Journals Connector (OSTI)

This paper presents a summary of the methods and algorithms used for the real time control of the Brilliant Eyes Thermal Storage Unit (BETSU) experiment. The BETSU utilized 2-methyl pentane as a 120 K Phase Change

D. S. Glaister; K. D. Bell; D. J. Hernandez; M. Bello…

1995-01-01T23:59:59.000Z

106

Building America Webinar: Opportunities to Apply Phase Change Materials to Building Enclosures  

Broader source: Energy.gov [DOE]

This webinar, presented by research team Fraunhofer Center for Sustainable Energy Systems (CSE), reviewed basic physical characteristics and thermal properties of phase change materials (PCMs) and provided guidance on how to effectively apply PCMs in buildings in the United States.

107

Characterization of the properties for phase-change material GeSb  

Science Journals Connector (OSTI)

Te-free environmentally friendly GeSb phase-change material has been investigated. Eutectic Ge15Sb85...composition, which has a proper high crystallization temperature of 230°C, is a good candidate for the applic...

Yifeng Gu; Ting Zhang; Zhitang Song; Yanbo Liu; Bo Liu; Songlin Feng

2010-04-01T23:59:59.000Z

108

Competition Between Thermal and Non-Thermal Processes During Femtosecond Switching of Phase Change Materials  

Science Journals Connector (OSTI)

We use ultrafast optics and electron diffraction to measure irreversible amorphization of crystalline Ge2Sb2Te5 phase change films. We find that light directly modifies the local...

Wall, Simon; Waldecker, Lutz; Miller, Timothy A; Ernstorfer, Ralph; Pruneri, Valerio; Rude, Miquel; Simpson, Robert

109

Phase change material based tunable reflectarray for free-space optical inter/intra chip interconnects  

Science Journals Connector (OSTI)

The concept of phase change material (PCM) based optical antennas and antenna arrays is proposed for dynamic beam shaping and steering utilized in free-space optical inter/intra chip...

Zou, Longfang; Cryan, Martin; Klemm, Maciej

2014-01-01T23:59:59.000Z

110

Fast tuning of Fano resonance in metal/phase-change materials/metal metamaterials  

Science Journals Connector (OSTI)

We propose fast tuning of a Fano resonance (FR) in a three dimensional metamaterial (MM). The MM consists of an elliptical nanohole array (ENA) embedded through a metal/ phase-change...

Cao, Tun; Wei, Chenwei; Simpson, Robert E; Zhang, Lei; Cryan, Martin J

2014-01-01T23:59:59.000Z

111

Modeling a solar energy collector with an integrated phase-change material .  

E-Print Network [OSTI]

??In this thesis, a finite-element computer model was created to simulate a solar air heater with an integrated-phase change material. The commercially available finite element… (more)

Guerra, Alexander Adrian

2009-01-01T23:59:59.000Z

112

Experimental Research on Thermal Performance of Lightweight Envelope Integrated with Phase Change Material  

Science Journals Connector (OSTI)

Present relief camp built with lightweight envelope has obvious cold-house effect and poor indoor thermal environment. Advantage of phase change material provides one possible way to improve thermal...

Jun Wang; Long Xu; Enshen Long

2014-01-01T23:59:59.000Z

113

Low Crosstalk Design of an Optical Matrix Switch Using Phase-Change Material  

Science Journals Connector (OSTI)

A crossbar type optical matrix switch using phase-change material was designed to have low crosstalk. The crosstalk of less than -49.1 dB was achieved for a 4×4 matrix switch by...

Moriyama, Takumi; Tanaka, Daiki; Jain, Paridhi; Tsuda, Hiroyuki

114

Development of building materials by using micro-encapsulated phase change material  

Science Journals Connector (OSTI)

Micro-encapsulated phase change material (Micro-PCM) could be used for ... thermal energy storage and also for PCM-building materials. Micro-PCM was prepared by in-situ ... ?m. The thermal fluctuation of PCM-buil...

See Hoon Lee; Sang Jun Yoon; Yong Gu Kim…

2007-03-01T23:59:59.000Z

115

Heat Transfer of a Multiple Helical Coil Heat Exchanger Using a Microencapsulated Phase Change Material Slurry  

E-Print Network [OSTI]

The present study has focused on the use of coil heat exchangers (CHEs) with microencapsulated phase change material (MPCM) slurries to understand if CHEs can yield greater rates of heat transfer. An experimental study was conducted using a...

Gaskill, Travis

2012-02-14T23:59:59.000Z

116

Some aspects of the computer simulation of conduction heat transfer and phase change processes  

SciTech Connect (OSTI)

Various aspects of phase change processes in materials are discussd including computer modeling, validation of results and sensitivity. In addition, the possible incorporation of cognitive activities in computational heat transfer is examined.

Solomon, A. D.

1982-04-01T23:59:59.000Z

117

Evaluation on the thin-film phase change material-based technologies  

E-Print Network [OSTI]

Two potential applications of thin film phase-change materials are considered, non-volatile electronic memories and MEMS (Micro-Electro-Mechanical Systems) actuators. The markets for those two applications are fast growing ...

Guo, Qiang, M. Eng. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

118

Project Profile: Encapsulated Phase Change Material in Thermal Storage for Baseload CSP Plants  

Broader source: Energy.gov [DOE]

Terrafore, under the Baseload CSP FOA, is developing novel encapsulated phase change materials (PCM) for use in thermal storage applications to significantly reduce the LCOE for baseload CSP plants.

119

Heat transfer and thermal management of electric vehicle batteries with phase change materials  

Science Journals Connector (OSTI)

This paper examines a passive thermal management system for electric vehicle batteries, consisting of encapsulated phase change material ( ... process to absorb the heat generated by a battery. A new configuratio...

M. Y. Ramandi; I. Dincer; G. F. Naterer

2011-07-01T23:59:59.000Z

120

State-of-the-Art and Outlook: Thermal Properties of Phase Change Wallboard Rooms  

E-Print Network [OSTI]

Phase change energy storage (PCES) has become more and more important in air conditioning and construction energy conservation, and has also become the focus of international research. This paper analyzes the domestic and foreign development of PCES...

Feng, G.; Liang, R.; Li, G.

2006-01-01T23:59:59.000Z

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


121

Phase-Change Frame Walls (PCFWs) for Peak Demand Reduction, Load Shifting, Energy Conservation and Comfort  

E-Print Network [OSTI]

) for lowering peak heat transfer rates across walls of residential and small commercial buildings. A PCFW is a typical wall in which phase change materials (PCMs) have been incorporated via macroencapsulation to enhance the energy storage capabilities...

Medina, M.; Stewart, R.

122

Project Profile: Indirect, Dual-Media, Phase Changing Material Modular Thermal Energy Storage System  

Broader source: Energy.gov [DOE]

Acciona Solar, under the Thermal Storage FOA, plans to design and validate a prototype and demonstrate a full-size (800 MWth) thermal energy storage (TES) system based on phase change materials (PCMs).

123

Research on Cool Storage Time of a Phase Change Wallboard Room in the Summer  

E-Print Network [OSTI]

Master Master Harin Institute of Technology Shenyang Jianzhu Universit Harbin P. R. China, 150090 hj_fgh@shjzu.edu.cn Abstract ? Through testing and analysis of the parameters of the indoor thermal property in a phase change wallboard room... Master Master Harin Institute of Technology Shenyang Jianzhu Universit Harbin P. R. China, 150090 hj_fgh@shjzu.edu.cn Abstract ? Through testing and analysis of the parameters of the indoor thermal property in a phase change wallboard room...

Feng, G.; Liang, R.; Li, G.

2006-01-01T23:59:59.000Z

124

Nucleation of a new phase on a surface that is changing irreversibly with time  

E-Print Network [OSTI]

Nucleation of a new phase almost always starts at a surface. This surface is almost always assumed not to change with time. However, surfaces can roughen, partially dissolve and change chemically with time. Each of these irreversible changes will change the nucleation rate at the surface, resulting in a time-dependent nucleation rate. Here we use a simple model to show that partial surface dissolution can qualitatively change the nucleation process, in a way that is testable in experiment. The changing surface means that the nucleation rate is increasing with time. There is an initial period during which no nucleation occurs, followed by relatively rapid nucleation.

Richard P. Sear

2014-01-02T23:59:59.000Z

125

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE-SCALE THERMAL ENERGY STORAGE  

E-Print Network [OSTI]

INORGANIC NANOPARTICLES AS PHASE-CHANGE MATERIALS FOR LARGE- SCALE THERMAL ENERGY STORAGE Miroslaw storage performance. The expected immediate outcome of this effort is the demonstration of high-energy generation at high efficiency could revolutionize the development of solar energy. Nanoparticle-based phase

Pennycook, Steve

126

Study on Solidification Characteristics of Phase Change Material in Rectangular Capsule for Cold Thermal Energy Storage System  

Science Journals Connector (OSTI)

This paper presents a solidification process model of phase change materials in a flat rectangular capsule for cold ... transfer in the flat rectangular capsule filled with phase change material (PCM) is consider...

Guiyin Fang; Fan Yang; Man Zhang

2009-01-01T23:59:59.000Z

127

Analysis of Heat Charging and Discharging on the Phase Change Energy-Storage Composite Wallboard (PCECW) in Building  

E-Print Network [OSTI]

This research paper combines the phase change material and the basal building material to constitute a kind of new phase change energy- storage composite wallboard (PCECW), applied in a residential building in Beijing. We analyzed the energy-storage...

Yue, H.; Chen, C.; Liu, Y.; Guo, H.

2006-01-01T23:59:59.000Z

128

The Numerical Simulation on Cooling Effect of Microcapsulated Phase Change Material Suspension in Laminar Thermal Developing Section  

Science Journals Connector (OSTI)

The microcapsulated phase change material (MEPCM) suspension has obtained more and ... concerning MECPM suspension are generally reduced to single-phase models. In this paper, a novel two-phase model is construct...

P. Q. Liu; J. Jin; G. P. Lin

2009-01-01T23:59:59.000Z

129

Application of Phase Change Wallboard to an Energy-Conservation Building in the Cold Area in North China  

E-Print Network [OSTI]

the characteristics of phase change energy storage material with DSC. We selected two kinds of fatty acid as phase change material to make a phase change wallboard, and then carried out a thermal functional analysis of performance of the wallboard. The results...

Feng, G.; Deng, D.; Li, G.

2006-01-01T23:59:59.000Z

130

2003 Yerkes Winter Institute Phase Changes States of Matter Lab, by Sarah Hansen -1 -1  

E-Print Network [OSTI]

Changes States of Matter Lab, by Sarah Hansen - 3 - 3 Boiling Lukewarm Water You will now get to watch2003 Yerkes Winter Institute ­ Phase Changes States of Matter Lab, by Sarah Hansen - 1 - 1 The Changeable States of Matter By Sarah Hansen Almost all of the different kinds of "stuff" around you can

Collar, Juan I.

131

Testing for Climate Change: An Application of the Two-Phase Regression Model  

Science Journals Connector (OSTI)

A statistical test for detecting a change in the behavior of an annual temperature series is presented. The test is based on the two-phase regression model. By trading the hypothesized time of change as an unknown parameter, the approach allows ...

Andrew R. Solow

1987-10-01T23:59:59.000Z

132

Characterization of Intermediate Phases Formed Between Solid Nickel and Liquid Zinc During Use as an Encapsulated Phase Change Material in Solar Thermal Energy Storage Systems  

Science Journals Connector (OSTI)

Of the new material systems under investigation for use in higher temperature phase change material-based solar thermal energy storage (TES) ... it is possible that the formation of intermediate phases could impe...

J. C. Sabol; W. Z. Misiolek; A. Oztekin…

2012-10-01T23:59:59.000Z

133

From petrochemistry to biotech: a European perspective on the bio-based economy  

Science Journals Connector (OSTI)

...fossilized fuels over biofuels...metabolic pathway engineering, synthetic...largest fossil fuel providing...short-term introduction of biorenewables...chemicals and biodiesel seem to provide...unpredictable and the introduction of their products...change. Fossil fuels created an...chemical process engineering has to team...

2011-01-01T23:59:59.000Z

134

Fundamental heat transfer processes related to phase change thermal storage media  

SciTech Connect (OSTI)

Research on fundamental heat transfer processes which occur in phase-change thermal storage systems is described. The research encompasses both melting and freezing, and includes both experiment and analysis. The status of four research problems is discussed. One of the freezing problems was focused on investigating, via experiment, the extent to which freezing can be enhanced by the attachment of fins to the external surface of a cooled vertical tube situated in a liquid phase-change medium. Very substantial enhancements were encountered which neutralize the degradation of freezing due to the thermal resistance of the frozen layer and to natural convection in the liquid phase. The second of the freezing problems was analytical in nature and sought to obtain solutions involving both the phase-change medium and the heat transfer fluid used either to add heat to or extract heat from the medium. For freezing on a plane wall, it was possible to obtain a closed-form analytical solution, while for freezing about a coolant-carrying circular tube, a new numerical methodology was devised to obtain finite-difference solutions. For melting, quantitative design-quality heat transfer coefficients were determined experimentally for melting adjacent to a heated vertical tube. These experiments explored the effects of solid-phase subcooling and of open versus closed top containment on the coefficients. A dimensionless correlation enables these results to be used for a wide range of phase-change media. Studies on melting of a phase-change material situated within a circular tube are in progress.

Sparrow, E. M.; Ramsey, J. W.

1981-01-01T23:59:59.000Z

135

NUMERICAL ANALYSIS OF VENTILATION TEMPERATURES REGULATION BY ENERGY STORAGE IN PHASE CHANGE  

E-Print Network [OSTI]

NUMERICAL ANALYSIS OF VENTILATION TEMPERATURES REGULATION BY ENERGY STORAGE IN PHASE CHANGE, the use of thermal energy storage (TES) systems receives increasing interest. To allow high or low temperature thermal energy to be stored for later use, a heat or cool storage with PCM could be designed; Zhu

Paris-Sud XI, Université de

136

Novel Phase Change Inks for Printing Three-Dimensional Veronika Chovancova-Lovell ,  

E-Print Network [OSTI]

-dimensional (3D) printing comprising different waxes, tackifier and plasticizer resins, rheology modifiers in a conventional phase- change printer in order to create 3D printed structures. Differential scanning calorimetry, a low viscosity binder is printed onto a powder coating to fuse materials together in a pattern. 3D

Fleming, Paul D. "Dan"

137

Numerical Simulation of Thermal Performance of Floor Radiant Heating System with Enclosed Phase Change Material  

E-Print Network [OSTI]

of the energy storage floor is designed,which places heat pipes in the enclosed phase change material (PCM) layer, without concrete in it. The PCM thermal storage time is studied in relation to the floor surface temperature under different low-temperature hot...

Qiu, L.; Wu, X.

2006-01-01T23:59:59.000Z

138

Simultaneous calorimetric and quick-EXAFS measurements to study the crystallization process in phase-change materials  

Science Journals Connector (OSTI)

New insights into the complex crystallization process in amorphous Ge15Sb85 phase-change material are presented. The structural mechanisms leading to phase separation are analysed using simultaneous calorimetric and quick-EXAFS measurements.

Zalden, P.

2012-07-07T23:59:59.000Z

139

Key experimental information on intermediate-range atomic structures in amorphous Ge2Sb2Te5 phase change material  

E-Print Network [OSTI]

.1063/1.3657139 Nature of phase transitions in crystalline and amorphous GeTe-Sb2Te3 phase change materials J. Chem. Phys on intermediate-range atomic structures in amorphous Ge2Sb2Te5 phase change material Shinya Hosokawa,1,2,a) Wolf change material Shinya Hosokawa, Wolf-Christian Pilgrim, Astrid Höhle, Daniel Szubrin, Nathalie Boudet

Paris-Sud XI, Université de

140

Optimal design of ground source heat pump system integrated with phase change cooling storage tank in an office building  

E-Print Network [OSTI]

Optimal design of ground source heat pump system integrated with phase change cooling storage tank in an office building Na Zhu*, Yu Lei, Pingfang Hu, Linghong Xu, Zhangning Jiang Department of Building Environment and Equipment Engineering... heat pump system integrated with phase change cooling storage technology could save energy and shift peak load. This paper studied the optimal design of a ground source heat pump system integrated with phase change thermal storage tank in an office...

Zhu, N.

2014-01-01T23:59:59.000Z

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


141

Redshifted and blueshifted photoluminescence emission of InAs/InP quantum dots upon amorphization of phase change material  

Science Journals Connector (OSTI)

We present the mechanisms underlying the redshifted and blueshifted photoluminescence (PL) of quantum dots (QDs) upon amorphization of phase change material (PCM). We calculated the...

Humam, Nurrul Syafawati Binti; Sato, Yu; Takahashi, Motoki; Kanazawa, Shohei; Tsumori, Nobuhiro; Regreny, Philippe; Gendry, Michel; Saiki, Toshiharu

2014-01-01T23:59:59.000Z

142

Performance evaluation of polymer/clay nanocomposite thermal protection systems based on polyethylene glycol phase change material  

Science Journals Connector (OSTI)

Phase change materials (PCMs) are substances with a high ... can be utilized in designing the heat protective materials as well as in the thermal energy...

Ahmad Reza Bahramian; Leila Sadat Ahmadi; Mehrdad Kokabi

2014-03-01T23:59:59.000Z

143

The North American Regional Climate Change Assessment Program: Overview of Phase I Results  

SciTech Connect (OSTI)

The North American Regional Climate Change Assessment Program is an international effort designed to systematically investigate the uncertainties in regional scale projections of future climate and produce high resolution climate change scenarios using multiple regional climate models (RCMs) nested within atmosphere ocean general circulation models (AOGCMs) forced with the A2 SRES scenario, with a common domain covering the conterminous US, northern Mexico, and most of Canada. The program also includes an evaluation component (Phase I) wherein the participating RCMs are nested within 25 years of NCEP/DOE global reanalysis II. The grid spacing of the RCM simulations is 50 km.

Mearns, L. O.; Arritt, R.; Biner, S.; Bukovsky, Melissa; McGinnis, Seth; Sain, Steve; Caya, Daniel; Correia Jr., James; Flory, Dave; Gutowski, William; Takle, Gene; Jones, Richard; Leung, Lai-Yung R.; Moufouma-Okia, Wilfran; McDaniel, Larry; Nunes, A.; Qian, Yun; Roads, J.; Sloan, Lisa; Snyder, Mark A.

2012-09-20T23:59:59.000Z

144

Tunneling Model of Phase Changes in Tetragonal Rare-Earth Crystals  

Science Journals Connector (OSTI)

The crystal-field theory for a rare-earth ion in tetragonal symmetry is studied in a semiclassical description. The low-lying quantum states are interpreted as tunneling states between classical minima. At low temperatures, spontaneous lattice distortions occur to lower some of the minima relative to others. The model is applied to DyVO4 and TbVO4 and is shown to lead to a good understanding of why they show phase changes and unusual paramagnetic properties.

E. Pytte and K. W. H. Stevens

1971-09-27T23:59:59.000Z

145

Process for CO2 Capture Using Ionic Liquid That Exhibits Phase Change  

Science Journals Connector (OSTI)

An expander turbine powered by the CO2-lean flue gas leaving the absorber recovers 43% of the power expended by the flue gas compressor. ... The authors appreciate the close collaboration with faculty at the University of Notre Dame, including Professors Joan Brennecke, Mark McCready, Mark Stadtherr, Bill Schneider, and Ed Maginn. ... The heat transfer within the adsorbent beds can be managed in situ, using thermal energy storage material: a phase change materials (PCM) for example. ...

Ronald S. Eisinger; George E. Keller; II

2014-10-27T23:59:59.000Z

146

Super energy saver heat pump with dynamic hybrid phase change material  

DOE Patents [OSTI]

A heat pump has a refrigerant loop, a compressor in fluid communication with the refrigerant loop, at least one indoor heat exchanger in fluid communication with the refrigerant loop, and at least one outdoor heat exchanger in fluid communication with the refrigerant loop. The at least one outdoor heat exchanger has a phase change material in thermal communication with the refrigerant loop and in fluid communication with an outdoor environment. Other systems, devices, and methods are described.

Ally, Moonis Raza (Oak Ridge, TN) [Oak Ridge, TN; Tomlinson, John Jager (Knoxville, TN) [Knoxville, TN; Rice, Clifford Keith (Clinton, TN) [Clinton, TN

2010-07-20T23:59:59.000Z

147

A Phase Change Storage Material that May be Used in the Fire Resistance of Building Structure  

Science Journals Connector (OSTI)

Abstract This study prepared polyethylene glycol/silicon dioxide composite, a kind of form-stable phase change material. The composites can be made into mortar which is able to adhere to the surface of building structure and absorb the fire heat. This paper aims to study the effect of the composites on the fire resistance of building structure. Scanning electronic microscope and differential scanning calorimeter were adopted to investigate the structural and thermal properties of the composites. It was found that the polyethylene glycol was well dispersed into the network of solid SiO2. And the latent heat of PEG/SiO2 increased with the decrease of SiO2 content. The required weight percentage of SiO2 was found to be 15% at least if the composites remain solid without leakage. It was also found that a phase change of pure PEG6000 happened with an enthalpy of 158 J/g while the 80 wt% PEG composite is 133 J/g. In conclusion, the phase change storage material may be used for fire resistance of building structure.

Peng Wang; Na Li; Cheng-shou Zhao; Liu-yan Wu; Guo-bin Han

2014-01-01T23:59:59.000Z

148

Computer Simulation of Multi-phase Coupled Heat and Moisture Transfer in Clothing Assembly with a Phase Change Material in a Cold Environment  

Science Journals Connector (OSTI)

This paper describes a simulation of the physical processes of coupled heat and moisture transfer in a clothing assembly containing phase change material (PCM). This paper focuses on the...

Shuxiao Wang; Yi Li; Hiromi Tokura; J. Y. Hu…

2006-01-01T23:59:59.000Z

149

MECHANISM OF THE PHASE CHANGE IN PbK2LiNb5O15: Dielectric, structural, and Raman scattering studies  

E-Print Network [OSTI]

unambiguously that the phase change in this material occurs between P4/mbm and Pba2 space groups, in goodMECHANISM OF THE PHASE CHANGE IN PbK2LiNb5O15: Dielectric, structural, and Raman scattering studies and ferroelectric phases and a complex structural change between them. High and low temperature phases

Boyer, Edmond

150

Efficient Phase-Change Materials: Development of a Low-Cost Thermal Energy Storage System Using Phase-Change Materials with Enhanced Radiation Heat Transfer  

SciTech Connect (OSTI)

HEATS Project: USF is developing low-cost, high-temperature phase-change materials (PCMs) for use in thermal energy storage systems. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at night—when the sun is not out—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. Most PCMs do not conduct heat very well. Using an innovative, electroless encapsulation technique, USF is enhancing the heat transfer capability of its PCMs. The inner walls of the capsules will be lined with a corrosion-resistant, high-infrared emissivity coating, and the absorptivity of the PCM will be controlled with the addition of nano-sized particles. USF’s PCMs remain stable at temperatures from 600 to 1,000°C and can be used for solar thermal power storage, nuclear thermal power storage, and other applications.

None

2011-12-05T23:59:59.000Z

151

Cementitious building material incorporating end-capped polyethylene glycol as a phase change material  

DOE Patents [OSTI]

A cementitious composition comprising a cementitious material and polyethylene glycol or end-capped polyethylene glycol as a phase change material, said polyethylene glycol and said end-capped polyethylene glycol having a molecular weight greater than about 400 and a heat of fusion greater than about 30 cal/g; the compositions are useful in making pre-formed building materials such as concrete blocks, brick, dry wall and the like or in making poured structures such as walls or floor pads; the glycols can be encapsulated to reduce their tendency to retard set.

Salyer, Ival O. (Dayton, OH); Griffen, Charles W. (Mason, OH)

1986-01-01T23:59:59.000Z

152

Pitch-based carbon foam heat sink with phase change material  

DOE Patents [OSTI]

A process for producing a carbon foam heat sink is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications. The foam is encased and filled with a phase change material to provide a very efficient heat sink device.

Klett, James W. (Knoxville, TN); Burchell, Timothy D. (Oak Ridge, TN)

2002-01-01T23:59:59.000Z

153

Pitch-based carbon foam heat sink with phase change material  

DOE Patents [OSTI]

A process for producing a carbon foam heat sink is disclosed which obviates the need for conventional oxidative stabilization. The process employs mesophase or isotropic pitch and a simplified process using a single mold. The foam has a relatively uniform distribution of pore sizes and a highly aligned graphic structure in the struts. The foam material can be made into a composite which is useful in high temperature sandwich panels for both thermal and structural applications. The foam is encased and filled with a phase change material to provide a very efficient heat sink device.

Klett, James W. (Knoxville, TN); Burchell, Timothy D. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

154

Method of lift-off patterning thin films in situ employing phase change resists  

DOE Patents [OSTI]

Method for making a patterned thin film of an organic semiconductor. The method includes condensing a resist gas into a solid film onto a substrate cooled to a temperature below the condensation point of the resist gas. The condensed solid film is heated selectively with a patterned stamp to cause local direct sublimation from solid to vapor of selected portions of the solid film thereby creating a patterned resist film. An organic semiconductor film is coated on the patterned resist film and the patterned resist film is heated to cause it to sublime away and to lift off because of the phase change.

Bahlke, Matthias Erhard; Baldo, Marc A; Mendoza, Hiroshi Antonio

2014-09-23T23:59:59.000Z

155

Evaluation of phase change materials for thermal regulation enhancement of building integrated photovoltaics  

Science Journals Connector (OSTI)

Regulating the temperature of building integrated photovoltaics (BIPV) using phase change materials (PCMs) reduces the loss of temperature dependent photovoltaic (PV) efficiency. Five \\{PCMs\\} were selected for evaluation all with melting temperatures ?25 ± 4 °C and heat of fusion between 140 and 213 kJ/kg. Experiments were conducted at three insolation intensities to evaluate the performance of each PCM in four different PV/PCM systems. The effect on thermal regulation of PV was determined by changing the (i) mass of PCM and (ii) thermal conductivities of the PCM and PV/PCM system. A maximum temperature reduction of 18 °C was achieved for 30 min while 10 °C temperature reduction was maintained for 5 h at ?1000 W/m2 insolation.

A. Hasan; S.J. McCormack; M.J. Huang; B. Norton

2010-01-01T23:59:59.000Z

156

Evaluation of phase change materials for thermal regulation enhancement of building integrated photovoltaics  

SciTech Connect (OSTI)

Regulating the temperature of building integrated photovoltaics (BIPV) using phase change materials (PCMs) reduces the loss of temperature dependent photovoltaic (PV) efficiency. Five PCMs were selected for evaluation all with melting temperatures {proportional_to}25 {+-} 4 C and heat of fusion between 140 and 213 kJ/kg. Experiments were conducted at three insolation intensities to evaluate the performance of each PCM in four different PV/PCM systems. The effect on thermal regulation of PV was determined by changing the (i) mass of PCM and (ii) thermal conductivities of the PCM and PV/PCM system. A maximum temperature reduction of 18 C was achieved for 30 min while 10 C temperature reduction was maintained for 5 h at -1000 W/m{sup 2} insolation. (author)

Hasan, A.; Norton, B. [Dublin Energy Lab., Focas Institute, School of Physics, Dublin Institute of Technology, Kevin St., Dublin 8 (Ireland); McCormack, S.J. [Department of Civil, Structure and Environmental Engineering, Trinity College Dublin, Dublin 1 (Ireland); Huang, M.J. [Centre for Sustainable Technologies, University of Ulster, Newtownabbey, N. Ireland, BT370QB (United Kingdom)

2010-09-15T23:59:59.000Z

157

Synthesis of shape-stabilized paraffin/silicon dioxide composites as phase change material for thermal energy storage  

Science Journals Connector (OSTI)

The shape-stabilized paraffin/silicon dioxide (SiO2) composite phase change materials (PCM) were prepared by using sol– ... and silicon dioxide was acted as the supporting material. Fourier transformation infrare...

Hui Li; Guiyin Fang; Xu Liu

2010-03-01T23:59:59.000Z

158

Influence of N-doping on the thermal stability and switching speed of Zn15Sb85 phase change material  

Science Journals Connector (OSTI)

The phase change characteristics of nitrogen doping Zn15Sb85 thin films were investigated by in situ film resistance measurements. The crystallization temperature and activation energy for crystallization of thin...

Xiaoqin Zhu; Yifeng Hu; Hua Zou…

2014-11-01T23:59:59.000Z

159

Thermal Performance of a Novel Heat Transfer Fluid Containing Multiwalled Carbon Nanotubes and Microencapsulated Phase Change Materials  

E-Print Network [OSTI]

The present research work aims to develop a new heat transfer fluid by combining multiwalled carbon nanotubes (MWCNT) and microencapsulated phase change materials (MPCMs). Stable nanofluids have been prepared using different sizes of multiwalled...

Tumuluri, Kalpana

2011-08-08T23:59:59.000Z

160

Thermoelectric generators incorporating phase-change materials for waste heat recovery from engine exhaust  

DOE Patents [OSTI]

Thermoelectric devices, intended for placement in the exhaust of a hydrocarbon fuelled combustion device and particularly suited for use in the exhaust gas stream of an internal combustion engine propelling a vehicle, are described. Exhaust gas passing through the device is in thermal communication with one side of a thermoelectric module while the other side of the thermoelectric module is in thermal communication with a lower temperature environment. The heat extracted from the exhaust gasses is converted to electrical energy by the thermoelectric module. The performance of the generator is enhanced by thermally coupling the hot and cold junctions of the thermoelectric modules to phase-change materials which transform at a temperature compatible with the preferred operating temperatures of the thermoelectric modules. In a second embodiment, a plurality of thermoelectric modules, each with a preferred operating temperature and each with a uniquely-matched phase-change material may be used to compensate for the progressive lowering of the exhaust gas temperature as it traverses the length of the exhaust pipe.

Meisner, Gregory P; Yang, Jihui

2014-02-11T23:59:59.000Z

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


161

Phase-Change Frame Walls (PCFWs) for On-Peak Demand Reduction and Energy Conservation in Residential Buildings: Development, Construction and Evaluation  

E-Print Network [OSTI]

macroencapsulated phase-change materials (PCMs), incorporated therein, was developed, constructed, and evaluated. This prototype wall is referred to as - phase-change frame wall (PCFW). A PCFW is a typical frame wall, consisting of outside siding, thermal insulation...

Zhang, M.; Medina, M. A.; King, J. B.

2004-01-01T23:59:59.000Z

162

Simplified numerical description of latent storage characteristics for phase change wallboard  

SciTech Connect (OSTI)

Cooling of residential California buildings contributes significantly to electrical consumption and peak power demand. Thermal mass can be utilized to reduce the peak-power demand, down-size the cooling systems and/or switch to low-energy cooling sources. Large thermal storage devices have been used in the past to overcome the short-comings of alternative cooling sources or to avoid high demand charges. With the advent of phase change material (PCM) implemented in gypsum board, plaster or other wall-covering material, thermal storage can be part of the building structure even for light-weight buildings. PCMs have two important advantages as storage media: they can offer an order-of-magnitude increase in thermal storage capacity and their discharge is almost isothermal. This allows to store large amounts of energy without significantly changing the temperature of the sheathing. As heat storage takes place in the building part where the loads occur, rather than externally (e.g., ice or chilled water storage), additional transport energy is not needed. To numerically evaluate the latent storage performance of treated wallboard, RADCOOL, a thermal building simulation model based on the finite difference approach, will be used. RADCOOL has been developed in the SPARK environment in order to be compatible with the new family of simulation tools being developed at Lawrence Berkeley Laboratory. As logical statements are difficult to use in SPARK, a continuous function for the specific heat and the enthalpy had to be found. This report covers the development of a simplified description of latent storage characteristics for wallboard treated with phase change material.

Feustel, H.E.

1995-05-01T23:59:59.000Z

163

Full-scale study of a building equipped with phase change material wallboards and a multi-layer rack latent heat thermal energy store system  

E-Print Network [OSTI]

Full-scale study of a building equipped with phase change material wallboards and a multi.borderon@entpe.fr SUMMARY An office building in Lyon, France has been studied. Phase Change Material (PCM) has been as sensible energy. As the temperature increases, the material changes phase from a solid to a liquid

Paris-Sud XI, Université de

164

Ultrafast terahertz-induced response of GeSbTe phase-change materials Michael J. Shu,1,2,a)  

E-Print Network [OSTI]

Ultrafast terahertz-induced response of GeSbTe phase-change materials Michael J. Shu,1,2,a) Peter-optically, pumping with single-cycle terahertz pulses as a means of biasing phase-change materials on a sub of these materials is important for predicting the field-driven heating and phase-change behavior. However

165

Distribution of nanoscale nuclei in the amorphous dome of a phase change random access memory  

SciTech Connect (OSTI)

The nanoscale crystal nuclei in an amorphous Ge{sub 2}Sb{sub 2}Te{sub 5} bit in a phase change memory device were evaluated by fluctuation transmission electron microscopy. The quench time in the device (?10 ns) afforded more and larger nuclei in the melt-quenched state than in the as-deposited state. However, nuclei were even more numerous and larger in a test structure with a longer quench time (?100 ns), verifying the prediction of nucleation theory that slower cooling produces more nuclei. It also demonstrates that the thermal design of devices will strongly influence the population of nuclei, and thus the speed and data retention characteristics.

Lee, Bong-Sub, E-mail: bongsub@gmail.com; Darmawikarta, Kristof; Abelson, John R. [Department of Materials Science and Engineering and the Coordinated Sciences Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Raoux, Simone; Shih, Yen-Hao; Zhu, Yu [IBM/Macronix PCRAM Joint Project, IBM T. J. Watson Research Center, Yorktown Heights, New York 10598 (United States); Bishop, Stephen G. [Department of Materials Science and Engineering and the Coordinated Sciences Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Department of Electrical and Computer Engineering and the Coordinated Sciences Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2014-02-17T23:59:59.000Z

166

Experimental performances of a battery thermal management system using a phase change material  

Science Journals Connector (OSTI)

Abstract Li-ion batteries are leading candidates for mobility because electric vehicles (EV) are an environmentally friendly mean of transport. With age, Li-ion cells show a more resistive behavior leading to extra heat generation. Another kind of problem called thermal runway arises when the cell is too hot, what happens in case of overcharge or short circuit. In order to evaluate the effect of these defects at the whole battery scale, an air-cooled battery module was built and tested, using electrical heaters instead of real cells for safety reasons. A battery thermal management system based on a phase change material is developed in that study. This passive system is coupled with an active liquid cooling system in order to initialize the battery temperature at the melting of the PCM. This initialization, or PCM solidification, can be performed during a charge for example, in other words when the energy from the network is available.

Charles-Victor Hémery; Franck Pra; Jean-François Robin; Philippe Marty

2014-01-01T23:59:59.000Z

167

Re-utilization of Industrial CO2 for Algae Production Using a Phase Change Material  

SciTech Connect (OSTI)

This is the final report of a 36-month Phase II cooperative agreement. Under this project, Touchstone Research Laboratory (Touchstone) investigated the merits of incorporating a Phase Change Material (PCM) into an open-pond algae production system that can capture and re-use the CO2 from a coal-fired flue gas source located in Wooster, OH. The primary objective of the project was to design, construct, and operate a series of open algae ponds that accept a slipstream of flue gas from a coal-fired source and convert a significant portion of the CO2 to liquid biofuels, electricity, and specialty products, while demonstrating the merits of the PCM technology. Construction of the pilot facility and shakedown of the facility in Wooster, OH, was completed during the first two years, and the focus of the last year was on operations and the cultivation of algae. During this Phase II effort a large-scale algae concentration unit from OpenAlgae was installed and utilized to continuously harvest algae from indoor raceways. An Algae Lysing Unit and Oil Recovery Unit were also received and installed. Initial parameters for lysing nanochloropsis were tested. Conditions were established that showed the lysing operation was effective at killing the algae cells. Continuous harvesting activities yielded over 200 kg algae dry weight for Ponds 1, 2 and 4. Studies were conducted to determine the effect of anaerobic digestion effluent as a nutrient source and the resulting lipid productivity of the algae. Lipid content and total fatty acids were unaffected by culture system and nutrient source, indicating that open raceway ponds fed diluted anaerobic digestion effluent can obtain similar lipid productivities to open raceway ponds using commercial nutrients. Data were also collected with respect to the performance of the PCM material on the pilot-scale raceway ponds. Parameters such as evaporative water loss, temperature differences, and growth/productivity were tracked. The pond with the PCM material was consistently 2 to 5°C warmer than the control pond. This difference did not seem to increase significantly over time. During phase transitions for the PCM, the magnitude of the difference between the daily minimum and maximum temperatures decreased, resulting in smaller daily temperature fluctuations. A thin layer of PCM material reduced overall water loss by 74% and consistently provided algae densities that were 80% greater than the control pond.

Joseph, Brian

2013-12-31T23:59:59.000Z

168

Phase change behaviors of Zn-doped Ge{sub 2}Sb{sub 2}Te{sub 5} films  

SciTech Connect (OSTI)

Zn-doped Ge{sub 2}Sb{sub 2}Te{sub 5} phase-change materials have been investigated for phase change memory applications. Zn{sub 15.16}(Ge{sub 2}Sb{sub 2}Te{sub 5}){sub 84.84} phase change film exhibits a higher crystallization temperature ({approx}258 Degree-Sign C), wider band gap ({approx}0.78 eV), better data retention of 10 years at 167.5 Degree-Sign C, higher crystalline resistance, and faster crystallization speed compared with the conventional Ge{sub 2}Sb{sub 2}Te{sub 5}. The proper Zn atom added into Ge{sub 2}Sb{sub 2}Te{sub 5} serves as a center for suppression of the face-centered-cubic (fcc) phase to hexagonal close-packed (hcp) phase transition, and fcc phase has high thermal stability partially due to the bond recombination among Zn, Sb, and Te atoms.

Wang Guoxiang; Nie Qiuhua [Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083 (China); Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China); Shen Xiang; Fu Jing; Xu Tiefeng; Dai Shixun [Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China); Wang, R. P. [Laser Physics Centre, Australian National University, Canberra, ACT 0200 (Australia); Wu Liangcai [Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China)

2012-07-30T23:59:59.000Z

169

Phase change material thermal storage for biofuel preheating in micro trigeneration application: A numerical study  

Science Journals Connector (OSTI)

Abstract A biofuel micro trigeneration prototype has been developed to utilise local energy crop oils as fuel in rural areas and developing countries. Straight plant oils (SPOs) only leave behind very little carbon footprint during its simply production process compared to commercial biodiesels in refineries, but the high viscosity of \\{SPOs\\} causes difficulties at engine cold starts, which further results in poor fuel atomisation, compromised engine performance and fast engine deterioration. In this study, a phase change material (PCM) thermal storage is designed to recover and store engine exhaust heat to preheat \\{SPOs\\} at cold starts. High temperature commercial paraffin is selected as the PCM to meet the optimal preheating temperature range of 70–90 °C, in terms of the SPO property study. A numerical model of the PCM thermal storage is developed and validated by references. The PCM melting and solidification processes with the consideration of natural convection in liquid zone are simulated in ANSYS-FLUENT to verify the feasibility of the PCM thermal storage as a part of the self-contained biofuel micro trigeneration prototype.

Dawei Wu; Junlong Chen; Anthony P. Roskilly

2015-01-01T23:59:59.000Z

170

Phase-change wallboard and mechanical night ventilation in commercial buildings: Potential for HVAC system downsizing  

SciTech Connect (OSTI)

As thermal storage media, phase-change materials (PCMs) such as paraffin, eutectic salts, etc. offer an order-of-magnitude increase in thermal storage capacity, and their discharge is almost isothermal. By embedding PCMs in dypsum board, plaster, or other wall-covering materials, the building structure acquires latent storage properties. Structural elements containing PCMs can store large amounts of energy while maintaining the indoor temperature within a relatively narrow range. As heat storage takes place inside the building where the loads occur, rather than at a central exterior location, the internal loads are removed without the need for additional transport energy. Distributed latent storage can thus be used to reduce the peak power demand of a building, downsize the cooling system, and/or switch to low-energy cooling sources. The authors used RADCOOL, a thermal building simulation program based on the finite difference approach, to numerically evaluate the thermal performance of PCM wallboard coupled with mechanical night ventilation in office buildings offers the opportunity for system downsizing in climates where the outside air temperature drops below 18 C at night. In climates where the outside air temperature remains above 19 C at night, the use of PCM wallboard should be coupled with discharge mechanisms other than mechanical night ventilation with outside air.

Stetiu, C.; Feustel, H.E.

1998-07-01T23:59:59.000Z

171

Metallic phase-change materials for solar dynamic energy storage systems  

SciTech Connect (OSTI)

Solar (thermal) dynamic power systems for satellites require a heat storage system that is capable of operating the engine during eclipse. The conventional approach to this thermal storage problem is to use the latent heat of fluoride salts, which would melt during insolation and freeze during eclipse. Although candidate fluorides have large heats of fusion per unit mass, their poor thermal conductivity limits the rate at which energy can be transferred to and from the storage device. System performance is further limited by the high parasitic mass of the superalloy canisters needed to contain the salt. This report describes a new thermal storage system in which the phase-change material (PCM) is a metal (typically germanium) contained in modular graphite canisters. These modules exhibit good thermal conductivity and low parasitic mass, and they are physically and chemically stable. Prototype modules have survived over 600 melt/freeze cycles without degradation. Advanced concepts to further improve performance are described. These concepts include the selection of ternary eutectic alloys to provide a wider range of useful melting temperatures and the use of infiltration to control the location of liquid alloy and to compensate for differences in thermal expansion. 13 refs., 18 figs.

Lauf, R.J.; Hamby, C. Jr.

1990-12-01T23:59:59.000Z

172

High temperature latent heat thermal energy storage: Phase change materials, design considerations and performance enhancement techniques  

Science Journals Connector (OSTI)

Abstract A very common problem in solar power generation plants and various other industrial processes is the existing gap between the period of thermal energy availability and its period of usage. This situation creates the need for an effective method by which excess heat can be stored for later use. Latent heat thermal energy storage is one of the most efficient ways of storing thermal energy through which the disparity between energy production or availability and consumption can be corrected, thus avoiding wastage and increasing the process efficiency. This paper reviews a series of phase change materials, mainly inorganic salt compositions and metallic alloys, which could potentially be used as storage media in a high temperature (above 300 °C) latent heat storage system, seeking to serve the reader as a comprehensive thermophysical properties database to facilitate the material selection task for high temperature applications. Widespread utilization of latent heat storage systems has been held back by the poor thermal conductivity and some other inherent drawbacks of the use of PCMs; this paper reviews several heat transfer and performance enhancement techniques proposed in the literature and discusses a number of design considerations that must be taken into account aiming to provide a broad overview for the design of high temperature latent heat based thermal energy storage systems.

Bruno Cárdenas; Noel León

2013-01-01T23:59:59.000Z

173

E-Print Network 3.0 - amorphous-crystal phase change Sample Search...  

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

method using the Tersoff (C) potential. With the solid phase... Phase Epitaxy (SPE) growth (111direction at 2100K). 12;3. 3.1 001, 111 Fig. 3 Fig. 3 -4.25eV 111...

174

Verification and Validation of EnergyPlus Conduction Finite Difference and Phase Change Material Models for Opaque Wall Assemblies  

SciTech Connect (OSTI)

Phase change materials (PCMs) represent a potential technology to reduce peak loads and HVAC energy consumption in buildings. There are few building energy simulation programs that have the capability to simulate PCM but their accuracy has not been completely tested. This report summarizes NREL efforts to develop diagnostic tests cases to obtain accurate energy simulations when PCMs are modeled in residential buildings.

Tabares-Velasco, P. C.; Christensen, C.; Bianchi, M.; Booten, C.

2012-07-01T23:59:59.000Z

175

Coupled Analysis of Change in Fracture Permeability during the Cooling Phase of the Yucca Mountain Drift Scale Test  

SciTech Connect (OSTI)

This paper presents results from a coupled thermal, hydrological and mechanical analysis of thermally-induced permeability changes during heating and cooling of fractured volcanic rock at the Drift Scale Test at Yucca Mountain, Nevada. The analysis extends the previous analysis of the four-year heating phase to include newly available data from the subsequent four year cooling phase. The new analysis of the cooling phase shows that the measured changes in fracture permeability follows that of a thermo-hydro-elastic model on average, but at several locations the measured permeability indicates (inelastic) irreversible behavior. At the end of the cooling phase, the air-permeability had decreased at some locations (to as low as 0.2 of initial), whereas it had increased at other locations (to as high as 1.8 of initial). Our analysis shows that such irreversible changes in fracture permeability are consistent with either inelastic fracture shear dilation (where permeability increased) or inelastic fracture surface asperity shortening (where permeability decreased). These data are important for bounding model predictions of potential thermally-induced changes in rock-mass permeability at a future repository at Yucca Mountain.

Rutqvist, Jonny; Rutqvist, J.; Freifeld, B.; Tsang, Y.W.; Min, K.B.; Elsworth, D.

2008-06-01T23:59:59.000Z

176

Encapsulation of copper-based phase change materials for high temperature thermal energy storage  

Science Journals Connector (OSTI)

Abstract Worldwide attention has been paid to high temperature phase change materials (PCMs) utilized in latent heat storage systems such as solar thermal power generation or industrial waste heat recovery. Current high temperature \\{PCMs\\} on basis of molten salts are suffering from inherent low thermal conductivity, which is detrimental to heat release rate and systematically thermal efficiency. Metal materials, always possessing ultrahigh thermal conductivity and satisfied heat fusion, are highly suitable as PCMs. However, the development of metal-based \\{PCMs\\} must overcome the package problem, namely, packing active, high temperature liquid metal into durable container. In this paper, copper capsules coated with refractory metallic shells were proposed as a novel metal PCM, which could work at temperature up to 1000 °C. Copper spheres with diameter of millimeters were encapsulated with a thick chromium–nickel bilayer by a novel chromium periodic-barrel electroplating method and nickel barrel-plating method. The latent heat density of as-prepared capsules is up to 75% of the theoretical value (about 71 J/g) at the melting temperature of 1077 °C and the thermal resistance of chromium–nickel layer is 8.27×10?6 m2 k/w. Particularly, copper capsules could endure 1000 charge–discharge thermal cycles from 1050 °C to 1150 °C without any leakage. The structure investigations reveal the excellent oxidation resistance of capsules and good stability between copper and chromium–nickel layer, even after long-term charge–discharge cycles. The results demonstrate that as-prepared copper capsules are applicable as high temperature \\{PCMs\\} which can facilitate high temperature thermal energy storage systems.

Guocai Zhang; Jianqiang Li; Yunfa Chen; Heng Xiang; Bingqian Ma; Zhe Xu; Xiaoguang Ma

2014-01-01T23:59:59.000Z

177

Terahertz and direct current losses and the origin of non-Drude terahertz conductivity in the crystalline states of phase change materials  

E-Print Network [OSTI]

in the crystalline states of phase change materials Koichi Shimakawa,1,2 Tomas Wagner,1 Miloslav Frumar,1 FilipSbTe and AgInSbTe phase-change material systems are re-examined and discussed. Although a simple free carrier Publishing LLC. [http://dx.doi.org/10.1063/1.4847395] I. INTRODUCTION Phase-change materials (PCMs) based

KuÂ?el, Petr

178

Performance improvement of Ge-Sb-Te material by GaSb doping for phase change memory  

SciTech Connect (OSTI)

Effects of GaSb doping on phase change characteristics of Ge-Sb-Te material are investigated by in situ resistance and x-ray diffraction measurement, optical spectroscopy, and x-ray photoelectron spectroscopy. The crystallization temperature and data retention of Ge-Sb-Te material increase significantly by the addition of GaSb, which results from the high thermal stability of amorphous GaSb. In addition, GaSb-doped Ge-Sb-Te material exhibits faster crystallization speed due to the change in electronic states as a result of the formation of chemical bonds with Ga element. Incorporation of GaSb is highly effective way to enhance the comprehensive performance of Ge-Sb-Te material for phase change memory.

Lu, Yegang [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China) [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China); Graduate School of Chinese Academy of Sciences, Beijing 100049 (China); Zhang, Zhonghua; Song, Sannian; Cheng, Limin; Song, Zhitang [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China)] [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Shen, Xiang; Wang, Guoxiang; Dai, Shixun [Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)] [Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)

2013-06-17T23:59:59.000Z

179

Thermal tuning of mid-infrared plasmonic antenna arrays using a phase change material  

Science Journals Connector (OSTI)

We demonstrate that the resonances of infrared plasmonic antennas can be tuned or switched on/off by taking advantage of the thermally driven insulator-to-metal phase transition in...

Kats, Mikhail A; Blanchard, Romain; Genevet, Patrice; Yang, Zheng; Qazilbash, M Mumtaz; Basov, D N; Ramanathan, Shriram; Capasso, Federico

2013-01-01T23:59:59.000Z

180

Change in the Local Environment of Paramagnetic Ions in Phase Transition during Glass Crystallization  

Science Journals Connector (OSTI)

The EPR technique has been used to study the behaviour of impurity ions in the course of phase transformations during the crystallization of glass. The paramagnetic ions have been found to be copable of both inco...

E. I. Abdrashitova

1979-01-01T23:59:59.000Z

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


181

Flexibility in heat demand at the TU Delft campus smart thermal grid with phase change materials:.  

E-Print Network [OSTI]

??Plans have been made to change the current district heating grid at the TU Delft to a smart thermal grid. New heat suppliers will be… (more)

Van Vliet, E.H.A.

2013-01-01T23:59:59.000Z

182

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

CHANGE THERMAL ENERGY STORAGE FOR CONCENTRATING SOLAR POWERfor Thermal Energy Storage in Concentrated Solar Thermalfor Thermal Energy Storage in Concentrated Solar Thermal

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

183

Phase Change Materials for Thermal Energy Storage in Concentrated Solar Thermal Power Plants  

E-Print Network [OSTI]

and Background Solar thermal energy collection is anCHANGE THERMAL ENERGY STORAGE FOR CONCENTRATING SOLAR POWERfor Thermal Energy Storage in Concentrated Solar Thermal

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

184

Stress development and shape change during press-hardening process using phase-transformation-based finite element analysis  

Science Journals Connector (OSTI)

Abstract Elastically driven shape change, or springback, in a press-hardened U-channel part made from a tailor-welded blank (TWB) was simulated using a fully coupled thermo-mechanical–metallurgical finite element (FE) method. The TWB consists of boron steel and high-strength low-alloy steel, which have significantly different hardenabilities. A combined implicit–explicit three-step simulation consisting of air cooling, forming and die quenching, and springback was used for computational efficiency. All the required material models such as the modified phase-transformation kinetics and phase-transformation-related stress-update scheme were implemented in the FE software ABAQUS with the user-defined subroutines UMAT, VUMAT, and HETVAL. The developed FE procedure, including the material models, satisfactorily predicted the experimentally measured shape changes of the TWB part. Here we present an in-depth analysis of the residual stress development during forming and die quenching using different material modeling schemes. It should be noted that the stress evolution of the two materials with high and low hardenabilities were significantly different depending on the phase transformation kinetics during forming and quenching. Moreover, in order to enhance the prediction capability of the press-hardening simulations, it was essential to include the phase-transformation-related strains in the material model.

H.H. Bok; J.W. Choi; D.W. Suh; M.G. Lee; F. Barlat

2014-01-01T23:59:59.000Z

185

Possible detection of phase changes from the non-transiting planet HD 46375b by CoRoT  

E-Print Network [OSTI]

The present work deals with the detection of phase changes in an exoplanetary system. HD 46375 is a solar analog known to host a non-transiting Saturn-mass exoplanet with a 3.0236 day period. It was observed by the CoRoT satellite for 34 days during the fall of 2008. We attempt to identify at optical wavelengths, the changing phases of the planet as it orbits its star. We then try to improve the star model by means of a seismic analysis of the same light curve and the use of ground-based spectropolarimetric observations. The data analysis relies on the Fourier spectrum and the folding of the time series. We find evidence of a sinusoidal signal compatible in terms of both amplitude and phase with light reflected by the planet. Its relative amplitude is Delta Fp/F* = [13.0, 26.8] ppm, implying an albedo A=[0.16, 0.33] or a dayside visible brightness temperature Tb ~ [1880,2030] K by assuming a radius R=1.1 R_Jup and an inclination i=45 deg. Its orbital phase differs from that of the radial-velocity signal by at...

Gaulme, P; Guillot, T; Mosser, B; Mary, D; Weiss, W W; Schmider, F -X; Bourguignon, S; Deeg, H J; Régulo, C; Aigrain, S; Schneider, J; Bruntt, H; Deheuvels, S; Donati, J -F; Appourchaux, T; Auvergne, M; Baglin, A; Baudin, F; Catala, C; Michel, E; Samadi, R; 10.1051/0004-6361/201014303

2010-01-01T23:59:59.000Z

186

Superlattice-like Ge8Sb92/Ge thin films for high speed and low power consumption phase change memory application  

Science Journals Connector (OSTI)

The amorphous-to-crystalline transitions of superlattice-like Ge8Sb92/Ge thin films were investigated through in situ film resistance measurement. X-ray reflectivity was used to measure the density change before and after phase change. The superlattice-like structure of the thin films was confirmed by using transmission electron microscopy. A picosecond laser pump–probe system was used to study the phase change speed. Phase change memory cells based on the SLL [Ge8Sb92(4 nm)/Ge(3 nm)]7 thin films were fabricated to test and verify the switching speed and operation consumption.

Yifeng Hu; Xiaoyi Feng; Jiwei Zhai; Ting Wen; Tianshu Lai; Sannian Song; Zhitang Song

2014-01-01T23:59:59.000Z

187

Thermographic analysis of polyurethane foams integrated with phase change materials designed for dynamic thermal insulation in refrigerated transport  

Science Journals Connector (OSTI)

Abstract The dispersion process of a micro-encapsulated phase change material (n-tetradecane) into a polyurethane foam was studied in order to develop a micro-composite insulating material with both low thermal conductivity and latent heat storage properties. The maximum weight content of micro-capsules added to the cellular matrix was 13.5%. Dynamic thermal properties of hybrid foams were investigated by means of a thermographic analysis. This was found to be a very effective diagnostic technique in detecting the change in heat transfer rate across the micro-composite foam in an indirect way, i.e. by measuring how the surface temperature changes over time under heat irradiation. Such a material would be of interest in the field of transport of perishable goods, particularly those requiring a controlled regime of carriage/storage temperatures.

Andrea Tinti; Antonella Tarzia; Alessandra Passaro; Riccardo Angiuli

2014-01-01T23:59:59.000Z

188

In-Situ Study of Thermal Comfort Enhancement in a Building Equipped with Phase Change Material  

E-Print Network [OSTI]

due to air temperature and radiative effects of the walls. Keywords: Thermal Energy Storage, Phase, thermal energy storage systems are essential for reducing de- pendency on fossil fuels buildings. Thermal energy storage can be accomplished either by using sensible heat storage or latent heat

189

Changing Phases of Alien Worlds: Probing Atmospheres of Kepler Planets with High-Precision Photometry  

E-Print Network [OSTI]

We present a comprehensive analysis of planetary phase variations, including possible planetary light offsets, using eighteen quarters of data from the Kepler space telescope. After correcting for systematics, we found fourteen systems with significant detections in each of the phase curve components: planet's phase function, secondary eclipse, Doppler boosting and ellipsoidal variations. We model the full phase curve simultaneously, including primary and secondary transits, and derive albedos, day- and night-side temperatures and planet masses. We find that KOI-13b, with a small eccentricity, is the only planet for which an eccentric orbit is favored. We detect a third harmonic with an amplitude of 1.9 ppm for HAT-P-7b for the first time, and confirm the third harmonic for KOI-13b reported in Esteves et al. (2013): both could be due to their spin-orbit misalignments. We also performed a bootstrap analysis of each of our targets, and conclude that the photometric variations of Kepler-43b are not of planetary ...

Esteves, Lisa J; Jayawardhana, Ray

2014-01-01T23:59:59.000Z

190

Structural transformation of Sb-based high-speed phase-change material  

Science Journals Connector (OSTI)

On heating, amorphous Ag3.1In3.7Sb76.4Te16.5 crystallizes at 416 K in an A7 structure type with atomic sites randomly occupied by the four constituent elements. At 545 K the compound decomposes into two crystalline phases: AgInTe2 is stable up to the melting point, while Sb89Te11 has a modulated layer structure with a temperature-dependent layer period.

Matsunaga, T.

2012-10-23T23:59:59.000Z

191

Phase-change materials to improve solar panel's performance Pascal Biwole1,2,*  

E-Print Network [OSTI]

-change materials to improve solar panel's performance Pascal Biwole1,2,* , Pierre Eclache3 , Frederic Kuznik3 1-mail:phbiwole@unice.fr Abstract: High operating temperatures induce a loss of efficiency in solar photovoltaic and thermal panels set-up. Results show that adding a PCM on the back of a solar panel can maintain the panel

192

Changing the Hilbert space structure as a consequence of gauge transformations in "extended phase space" version of quantum geometrodynamics  

E-Print Network [OSTI]

In the earlier works on quantum geometrodynamics in extended phase space it has been argued that a wave function of the Universe should satisfy a Schrodinger equation. Its form, as well as a measure in Schrodinger scalar product, depends on a gauge condition (a chosen reference frame). It is known that the geometry of an appropriate Hilbert space is determined by introducing the scalar product, so the Hilbert space structure turns out to be in a large degree depending on a chosen gauge condition. In the present work we analyse this issue from the viewpoint of the path integral approach. We consider how the gauge condition changes as a result of gauge transformations. In this respect, three kinds of gauge transformations can be singled out: Firstly, there are residual gauge transformations, which do not change the gauge condition. The second kind is the transformations whose parameters can be related by homotopy. Then the change of gauge condition could be described by smoothly changing function. In particular, in this context time dependent gauges could be discussed. We also suggest that this kind of gauge transformations leads to a smooth changing of solutions to the Schrodinger equation. The third kind of the transformations includes those whose parameters belong to different homotopy classes. They are of the most interest from the viewpoint of changing the Hilbert space structure. In this case the gauge condition and the very form of the Schrodinger equation would change in discrete steps when we pass from a spacetime region with one gauge condition to another region with another gauge condition. In conclusion we discuss the relation between quantum gravity and fundamental problems of ordinary quantum mechanics.

T. P. Shestakova

2005-12-09T23:59:59.000Z

193

Graph-theoretic analysis of discrete-phase-space states for condition change detection and quantification of information  

SciTech Connect (OSTI)

Data collected from devices and human condition may be used to forewarn of critical events such as machine/structural failure or events from brain/heart wave data stroke. By monitoring the data, and determining what values are indicative of a failure forewarning, one can provide adequate notice of the impending failure in order to take preventive measures. This disclosure teaches a computer-based method to convert dynamical numeric data representing physical objects (unstructured data) into discrete-phase-space states, and hence into a graph (structured data) for extraction of condition change.

Hively, Lee M.

2014-09-16T23:59:59.000Z

194

Investigation of electromigration in In{sub 2}Se{sub 3} nanowire for phase change memory devices  

SciTech Connect (OSTI)

The decomposition of In{sub 2}Se{sub 3} nanowire phase change memory devices during current-driving operation was investigated. The devices were subjected to thermal/electrical stress with current density and electric field during the reset operation at 0.24–0.38 MA/cm{sup 2} and 5.3–6.4?kV/cm, respectively. After multiple operation cycles, a change in morphology and composition of the In{sub 2}Se{sub 3} nanowire was observed and led to the device failure. The transmission electron microscopy and energy dispersive analysis indicate that electromigration causes the catastrophic failure by void formation where In atoms migrate toward the cathode and Se atoms migrate toward the anode depending on their electronegativities.

Kang, Daegun [Department of Electrical Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of)] [Department of Electrical Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of); Rim, Taiuk; Baek, Chang-Ki [Creative IT Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of)] [Creative IT Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of); Meyyappan, M. [NASA Ames Research Center, Moffett Field, California 94035 (United States)] [NASA Ames Research Center, Moffett Field, California 94035 (United States); Lee, Jeong-Soo, E-mail: ljs6951@postech.ac.kr [Department of Electrical Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of) [Department of Electrical Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of); Division of IT Convergence Engineering, Pohang University of Science and Technology, Pohang (Korea, Republic of)

2013-12-02T23:59:59.000Z

195

POLARIZED RAMAN SPECTROSCOPIC STUDY OF THE PRESSURE-INDUCED PHASE CHANGE FROM  

E-Print Network [OSTI]

IN SPODUMENE (LIALSI2O6) Carolyn J.S. Pommier, University of Arizona, Chemistry, 1040 E 4TH STREET, TUCSON, AZ-0001 Spodumene (LiAlSi2O6) is a member of the pyroxene family of minerals, which comprise approximately 25, spodumene exhibits either C2/c or P21/c symmetry, accompanied by a 1.4% volume change at the transition

Downs, Robert T.

196

Numerical simulation of natural convection of latent heat phase-change-material microcapsulate slurry packed in a horizontal rectangular enclosure heated from below and cooled from above  

Science Journals Connector (OSTI)

A two-dimensional numerical simulation of natural convection in a rectangular enclosure heated from below and cooled from above has been conducted with non-Newtonian phase-change-material (PCM) microcapsulate slu...

Hideo Inaba; Yanlai Zhang; Akihiko Horibe; Naoto Haruki

2007-03-01T23:59:59.000Z

197

A Comparative Heat Transfer Examination of Structural Insulated Panels (SIPs) With and Without Phase Change Materials (PCMs) Using a Dynamic Wall Simulator  

E-Print Network [OSTI]

The main focus of this paper was to present data to advance the design of a previously developed thermally-enhanced structural insulated panel (SIP) that had been outfitted with phase change materials (PCMs) (Medina et al., 2008). To advance...

Medina, M.; Zhu, D.

198

Estimation of Hourly Solar Loads on the Surfaces of Moving Refrigerated Tractor Trailers Outfitted with Phase Change Materials (PCMs) for Several Routes across the Continental U.S.  

E-Print Network [OSTI]

The primary objective of this thesis was to calculate solar loads, wind chill temperatures on the surfaces of moving refrigerated tractor trailers outfitted with phase change materials (PCMs) for several routes across the Continental United States...

Varadarajan, Krupasagar

2011-08-31T23:59:59.000Z

199

A Study of Internal Friction, Electric Resistance and Shape Change in Cu-Zn and Cu-Zn-Al Alloys During Phase Transformation Use Simultaneous Measurement Method  

Science Journals Connector (OSTI)

The internal friction (Q-1), electric resistance (r), shape change (X),...-1...peaks are not due to the phase transformation but due to point defects. The electric resistance during thermoelastic martensite (TEM)...

Yuan-Ti Huang; Tian-Fei Wang; Yin Mei

1990-01-01T23:59:59.000Z

200

Dynamic Heat Flow Measurements to Study the Distribution of Phase-Change Material in an Insulation Matrix  

SciTech Connect (OSTI)

Phase change materials (PCMs) are used in building envelopes in many forms. The PCMs may be encased in discrete pouches or containers, or they may be distributed within another medium, such as in a board or within a loose fill product. In addition, most PCM products are blends containing fire retardants and chemical stabilizers. However, the current test method to measure the dynamic characteristics of PCMs, the differential scanning calorimeter (DSC), requires specimens that are relatively uniform and very small. Considering the limitations of DSC test results when applied to more complex PCM building envelope applications, we developed a combined experimental analytical protocol to determine the amount of phase-change energy actually available to provide thermal storage. This paper presents this new methodology for performing dynamic heat flow analysis of complex PCM-enhanced building materials. The experimental analytical protocol uses a conventional heat-flow apparatus and three-dimensional (3-D), finite-difference modeling. Based upon results from this methodology, ORNL researchers developed a simplified one-dimensional (1-D) model that can be easily used in whole-building simulations. This paper describes this methodology as applied to an insulation assembly containing a complex array of PCM pouches.

Kosny, Jan [ORNL] [ORNL; Stovall, Therese K [ORNL] [ORNL; Yarbrough, David W [ORNL] [ORNL

2010-01-01T23:59:59.000Z

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


201

Determination of Optical-Field Ionization Dynamics in Plasmas through the Direct Measurement of the Optical Phase Change  

SciTech Connect (OSTI)

This is the final report of a three-year Laboratory Directed Research and Development (LDRD) Project at Los Alamos National Laboratory (LANL). The detailed dynamics of an atom in a strong laser field is rich in both interesting physics and potential applications. The goal of this project was to develop a technique for characterizing high-field laser-plasma interactions with femtosecond resolution based on the direct measurement of the phase change of an optical pulse. The authors developed the technique of Multi-pulse Interferometric Frequency Resolved Optical Gating (MI-FROG), which recovers (to all orders) the phase difference between pumped and unpumped probe pulses, enabling the determination of sub-pulsewidth time-resolved phase and frequency shifts impressed by a pump pulse on a weak probe pulse. Using MI-FROG, the authors obtained the first quantitative measurements of high-field ionization rates in noble gases and diatomic molecules. They obtained agreement between the measured ionization rates an d those calculated for the noble gases and diatomic nitrogen and hydrogen using a one-dimensional fluid model and rates derived from tunneling theory. However, much higher rates are measured for diatomic oxygen than predicted by tunneling theory calculations.

Taylor, A.J.; Omenetto, G.; Rodriguez, G.; Siders, C.W.; Siders, J.L.W.; Downer, C.

1999-07-16T23:59:59.000Z

202

Effects of self-heating and phase change on the thermal profile of hydrogen isotopes in confined geometries  

SciTech Connect (OSTI)

Growth of high-quality single-crystal hydrogen in confined geometries relies on the in situ formation of seed crystals. Generation of deuterium-tritium seed crystals in a confined geometry is governed by three effects: self-heating due to tritium decay, external thermal environment, and latent heat of phase change at the boundary between hydrogen liquid and vapor. A detailed computation of the temperature profile for liquid hydrogen inside a hollow shell, as is found in inertial confinement fusion research, shows that seeds are likely to form at the equatorial plane of the shell. Radioactive decay of tritium to helium slowly alters the composition of the hydrogen vapor, resulting in a modified temperature profile that encourages seed formation at the top of the shell. We show that the computed temperature profile is consistent with a variety of experimental observations.

Baxamusa, S., E-mail: baxamusa1@llnl.gov; Field, J.; Dylla-Spears, R.; Kozioziemski, B.; Suratwala, T.; Sater, J. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States)

2014-03-28T23:59:59.000Z

203

Thermal energy storage in phase change material. Final scientific report 1 Feb 81-31 Jan 82  

SciTech Connect (OSTI)

The present study deals with an experimental investigation of low temperature thermal storage based on macroencapsulation of Phase Change Material (PCM). The storage performance capabilities of capsule bed, tube bank and tubular single-pass heat exchanger are compared. The tests are conducted on the VKI Solar Utility Network (SUN) which is a closed loop facility designed to study air heating systems. An original data acquisition chain based on two conversing microprocessors is developed to carry out mass flow, pressure drop and temperature measurements. The experimental results are interpreted on the basis of comparison with numerical predictions and they allow to draw the following conclusions. Each type of matrix has its own range of operation for practical application but from a heat transfer standpoint, the PCM capsule packing unit is strongly recommended. It is suggested to extend this investigation to the effect of Reynolds number to find optimum range for thermo-mechanical efficiency.

White, P.; Buchlin, J-M.

1982-03-01T23:59:59.000Z

204

Thermal simulation and system optimization of a chilled ceiling coupled with a floor containing a phase change material (PCM)  

Science Journals Connector (OSTI)

Abstract The integration of phase change materials (PCMs) for cooling applications in buildings reduces the amplitude of indoor air temperature fluctuations due to solar and internal gains, enabling passive solar, HVAC system downsizing or off-peak cooling designs. This work studies the use of radiant systems for discharging heat stored in a PCM; this approach differs from the typical practice of accomplishing this task by either night cooling ventilation or embedding an active heat exchanger into the PCM of the wall. In this study, a PCM is incorporated into the floor, and a hydronic radiant ceiling system is used as the energy discharge system. The advantages and disadvantages of this configuration in terms of cooling energy demands and thermal comforts of occupants are analyzed using the simulation software TRNSYS®. Five design parameters are optimized using the software GENOPT®. The simulation reveals that when accompanied by an air-to-air heat recovery system, this configuration can significantly reduce the cooling energy demand (more than 50% compared to the cooling energy demand of the same building without PCM) and can thus significantly reduce the energy consumption. However, the degrees of occupant comfort will inevitably vary (i.e., the predicted percent dissatisfied (PPD) increases by 2–5%).

J.F. Belmonte; P. Eguía; A.E. Molina; J.A. Almendros-Ibáńez

2015-01-01T23:59:59.000Z

205

Performance investigation of thermal energy storage system with Phase Change Material (PCM) for solar water heating application  

Science Journals Connector (OSTI)

Abstract In order to harvest solar energy, thermal energy storage (TES) system with Phase Change Material (PCM) has been receiving greater attention because of its large energy storage capacity and isothermal behavior during charging and discharging processes. In the present experimental study, shell and tube TES system using paraffin wax was used in a water heating system to analyze its performance for solar water heating application. Energy and exergy including their cost analyses for the TES system were performed. Accordingly, total life cycle cost was calculated for different flow rates of the Heat Transfer Fluid (HTF). With 0.033 kg/min and 0.167 kg/min flow rates of water as HTF, energy efficiencies experienced were 63.88% and 77.41%, respectively, but in exergy analysis, efficiencies were observed to be about 9.58% and 6.02%, respectively. Besides, the total life cycle cost was predicted to be $ 654.61 for 0.033 kg/min flow rate, which could be reduced to $ 609.22 by increasing the flow rate to 0.167 kg/min. Therefore it can be summarized that total life cycle cost decreases with the increase of flow rate.

M.H. Mahfuz; M.R. Anisur; M.A. Kibria; R. Saidur; I.H.S.C. Metselaar

2014-01-01T23:59:59.000Z

206

Efficient Heat Storage Materials: Metallic Composites Phase-Change Materials for High-Temperature Thermal Energy Storage  

SciTech Connect (OSTI)

HEATS Project: MIT is developing efficient heat storage materials for use in solar and nuclear power plants. Heat storage materials are critical to the energy storage process. In solar thermal storage systems, heat can be stored in these materials during the day and released at night—when the sun’s not out—to drive a turbine and produce electricity. In nuclear storage systems, heat can be stored in these materials at night and released to produce electricity during daytime peak-demand hours. MIT is designing nanostructured heat storage materials that can store a large amount of heat per unit mass and volume. To do this, MIT is using phase change materials, which absorb a large amount of latent heat to melt from solid to liquid. MIT’s heat storage materials are designed to melt at high temperatures and conduct heat well—this makes them efficient at storing and releasing heat and enhances the overall efficiency of the thermal storage and energy-generation process. MIT’s low-cost heat storage materials also have a long life cycle, which further enhances their efficiency.

None

2011-11-21T23:59:59.000Z

207

Dramatic changes in the electronic structure upon transition to the collapsed tetragonal phase in CaFe2As2  

SciTech Connect (OSTI)

We use angle-resolved photoemission spectroscopy and density functional theory calculations to study the electronic structure of CaFe2As2 in the collapsed tetragonal (CT) phase. This unusual phase of iron arsenic high-temperature superconductors was hard to measure as it exists only under pressure. By inducing internal strain, via the postgrowth thermal treatment of single crystals, we were able to stabilize the CT phase at ambient pressure. We find significant differences in the Fermi surface topology and band dispersion data from the more common orthorhombic-antiferromagnetic or tetragonal-paramagnetic phases, consistent with electronic structure calculations. The top of the hole bands sinks below the Fermi level, which destroys the nesting present in parent phases. The absence of nesting in this phase, along with an apparent loss of Fe magnetic moment, are now clearly experimentally correlated with the lack of superconductivity in this phase.

Dhaka, R. S. [Ames Laboratory; Jiang, Rui [Ames Laboratory; Budko, Sergey L. [Ames Laboratory; Canfield, Paul C. [Ames Laboratory; Harmon, Bruce N. [Ames Laboratory; Kaminski, Adam [Ames Laboratory; Tomic, Milan [Goethe-Universitat; Valenti, Roser [Goethe-Universitat; Lee, Yongbin [Ames Laboratory

2014-01-31T23:59:59.000Z

208

Structural change associated with the incommensurate-normal phase transition in akermanite, Ca2MgSi2O7, at high pressure  

Science Journals Connector (OSTI)

...?The structural changes associated with the incommensurate (IC)-normal (N) phase transition in akermanite have been studied with high-pressure single-...a and c axes are 0.00280(10) and 0.00418(6)?GPa?1 for th...

Hexiong Yang; Robert M. Hazen; Robert T. Downs…

1997-09-01T23:59:59.000Z

209

Switching of localized surface plasmon resonance of gold nanoparticles on a GeSbTe film mediated by nanoscale phase change and modification of surface morphology  

SciTech Connect (OSTI)

As a platform for active nanophotonics, localized surface plasmon resonance (LSPR) switching via interaction with a chalcogenide phase change material (GeSbTe) was investigated. We performed single-particle spectroscopy of gold nanoparticles placed on a GeSbTe thin film. By irradiation with a femtosecond pulsed laser for amorphization and a continuous wave laser for crystallization, significant switching behavior of the LSPR band due to the interaction of GeSbTe was observed. The switching mechanism was explained in terms of both a change in the refractive index and a modification of surface morphology accompanying volume expansion and reduction of GeSbTe.

Hira, T.; Homma, T.; Uchiyama, T.; Kuwamura, K.; Saiki, T. [Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku, Yokohama, Kanagawa 223-8522 (Japan)] [Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku, Yokohama, Kanagawa 223-8522 (Japan)

2013-12-09T23:59:59.000Z

210

Upper limit of the energy of the photon and the phase change of photon to material particles at the Scwartzschild radius  

E-Print Network [OSTI]

The concept of Scwartzschild radius is extended to the photon and the upper limit imposed on the energy of a photon as a result of the three characteristics of the photon--the constancy of the velocity of light, the spin value of $1\\hslash$ and the zero rest mass of the photon--is shown. Further the phase change that occurs to the photon at the Scwartzschild radius, from energy to matter as a result of vacuum fluctuations is indicated.

C. Radhakrishnan Nair

2005-06-10T23:59:59.000Z

211

Vibrational spectra of CO adsorbed on oxide thin films: A tool to probe the surface defects and phase changes of oxide thin films  

SciTech Connect (OSTI)

Thin films of iron oxide were grown on Pt(111) single crystals using cycles of physical vapor deposition of iron followed by oxidative annealing in an ultrahigh vacuum apparatus. Two procedures were utilized for film growth of ?15–30 ML thick films, where both procedures involved sequential deposition+oxidation cycles. In procedure 1, the iron oxide film was fully grown via sequential deposition+oxidation cycles, and then the fully grown film was exposed to a CO flux equivalent to 8 × 10{sup ?7} millibars, and a vibrational spectrum of adsorbed CO was obtained using infrared reflection-absorption spectroscopy. The vibrational spectra of adsorbed CO from multiple preparations using procedure 1 show changes in the film termination structure and/or chemical nature of the surface defects—some of which are correlated with another phase that forms (“phase B”), even before enough of phase B has formed to be easily detected using low energy electron diffraction (LEED). During procedure 2, CO vibrational spectra were obtained between deposition+oxidation cycles, and these spectra show that the film termination structure and/or chemical nature of the surface defects changed as a function of sequential deposition+oxidation cycles. The authors conclude that measurement of vibrational spectra of adsorbed CO on oxide thin films provides a sensitive tool to probe chemical changes of defects on the surface and can thus complement LEED techniques by probing changes not visible by LEED. Increased use of vibrational spectra of adsorbed CO on thin films would enable better comparisons between films grown with different procedures and by different groups.

Savara, Aditya, E-mail: savaraa@ornl.gov [Chemical Sciences Division, Oak Ridge National Lab, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831 (United States)

2014-03-15T23:59:59.000Z

212

Integrated modeling of CO2 storage and leakage scenarios including transitions between super- and sub-critical conditions, and phase change between liquid and gaseous CO2  

SciTech Connect (OSTI)

Storage of CO{sub 2} in saline aquifers is intended to be at supercritical pressure and temperature conditions, but CO{sub 2} leaking from a geologic storage reservoir and migrating toward the land surface (through faults, fractures, or improperly abandoned wells) would reach subcritical conditions at depths shallower than 500-750 m. At these and shallower depths, subcritical CO{sub 2} can form two-phase mixtures of liquid and gaseous CO{sub 2}, with significant latent heat effects during boiling and condensation. Additional strongly non-isothermal effects can arise from decompression of gas-like subcritical CO{sub 2}, the so-called Joule-Thomson effect. Integrated modeling of CO{sub 2} storage and leakage requires the ability to model non-isothermal flows of brine and CO{sub 2} at conditions that range from supercritical to subcritical, including three-phase flow of aqueous phase, and both liquid and gaseous CO{sub 2}. In this paper, we describe and demonstrate comprehensive simulation capabilities that can cope with all possible phase conditions in brine-CO{sub 2} systems. Our model formulation includes: (1) an accurate description of thermophysical properties of aqueous and CO{sub 2}-rich phases as functions of temperature, pressure, salinity and CO{sub 2} content, including the mutual dissolution of CO{sub 2} and H{sub 2}O; (2) transitions between super- and subcritical conditions, including phase change between liquid and gaseous CO{sub 2}; (3) one-, two-, and three-phase flow of brine-CO{sub 2} mixtures, including heat flow; (4) non-isothermal effects associated with phase change, mutual dissolution of CO{sub 2} and water, and (de-) compression effects; and (5) the effects of dissolved NaCl, and the possibility of precipitating solid halite, with associated porosity and permeability change. Applications to specific leakage scenarios demonstrate that the peculiar thermophysical properties of CO{sub 2} provide a potential for positive as well as negative feedbacks on leakage rates, with a combination of self-enhancing and self-limiting effects. Lower viscosity and density of CO{sub 2} as compared to aqueous fluids provides a potential for self-enhancing effects during leakage, while strong cooling effects from liquid CO{sub 2} boiling into gas, and from expansion of gas rising towards the land surface, act to self-limit discharges. Strong interference between fluid phases under three-phase conditions (aqueous - liquid CO{sub 2} - gaseous CO{sub 2}) also tends to reduce CO{sub 2} fluxes. Feedback on different space and time scales can induce non-monotonic behavior of CO{sub 2} flow rates.

Pruess, K.

2011-05-15T23:59:59.000Z

213

Utilization of Science-Based Information on Climate Change in Decision Making and the Public Policy Process - Phase 2  

E-Print Network [OSTI]

The national public survey was conducted from April 3, 2007 through July 18, 2007 and included a total of 935 completed samples. Out of 935 completes, 833 completes were obtained from the general population of the US and 102 completes were obtained... of information for residents of the Gulf Coast about climate change and global warming were television news and newspapers. The internet and radio were also cited as important sources of information. Institute for Science, Technology and Public Policy...

Vedlitz, Arnold; Lindquist, Eric; Liu, Xinsheng; Zahran, Sammy; Wood, B. Dan; Alston, Letitia T.; North, Gerald

2013-12-19T23:59:59.000Z

214

Tailoring transient-amorphous states: Towards fast and power-efficient phase-change memories and neuromorphic computing  

E-Print Network [OSTI]

in a huge improvement in the energy efficiency and set speed during the following ACT pulse, as 22 shown in Figure 2a. Otherwise, there would be little change. These results indicate that the main origin of the increase of the minimum ACT... -term plasticity (STP) characteristics in biological synapses, in which the temporal enhancement in synaptic weight after the pre-synaptic pulse decays quickly. 7 Interestingly, very similar STP characteristics have been observed in Ag2S inorganic...

Lee, Tae Hoon; Loke, Desmond; Huang, Ke-Jie; Wang, Wei-Jie; Elliott, Stephen R.

2014-01-01T23:59:59.000Z

215

Microstructural changes during long-term tension creep of two-phase {gamma}-titanium aluminide alloys  

SciTech Connect (OSTI)

Long-term tension creep tests were performed on a Ti-48 at.% Al-2 at.% Cr alloy in order to assess the material behavior under the intended service conditions for structural parts in turbine engines. Deformation processes and microstructural changes were investigated by TEM on a specimen loaded to 140 MPa for 5,988 h at 700 C. At lamellar boundaries the emission of interfacial dislocations was observed and is thought to contribute significantly to the high primary creep rate of the material. Under the creep conditions gliding dislocations apparently become locked by the heterogeneous formation of precipitates along their cores. Lamellar interfaces revealed ledges which indicates that they migrate during creep.

Oehring, M.; Appel, F.; Wagner, R. [GKSS Research Centre, Geesthacht (Germany). Inst. for Materials Research; Ennis, P.J. [Juelich Research Centre (Germany). Inst. for Materials in Energy Systems

1997-12-31T23:59:59.000Z

216

Effects of germanium and nitrogen incorporation on crystallization of N-doped Ge{sub 2+x}Sb{sub 2}Te{sub 5} (x = 0,1) thin films for phase-change memory  

SciTech Connect (OSTI)

The phase-change behavior and microstructure changes of N-doped Ge{sub 3}Sb{sub 2}Te{sub 5}[N-GST(3/2/5)] and Ge{sub 2}Sb{sub 2}Te{sub 5}[GST(2/2/5)] films during the phase transition from an amorphous to a crystalline phase were studied using in situ temperature-dependent sheet resistance measurements, X-ray diffraction, and transmission electron microscopy. The optical band gaps of N-GST(3/2/5) films are higher than that of GST(2/2/5) film in both the amorphous and face-centered-cubic (fcc) phases. Ge nitride formation by X-ray photoelectron spectroscopy analysis increased the optical band gap and suppressed crystalline grain growth, resulting in an increase in the crystallization temperature and resistance in the fcc phase. As a result, the Ge- and N-doped GST(2/2/5) composite films can be considered as a promising material for phase-change memory application because of improved thermal stability and reduced power consumption.

Cheng Limin [State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Graduate School of Chinese Academy of Sciences, Beijing 10080 (China); Wu Liangcai; Song Zhitang; Rao Feng; Peng Cheng; Yao Dongning; Liu Bo [State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Xu Ling [National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China)

2013-01-28T23:59:59.000Z

217

Terahertz and direct current losses and the origin of non-Drude terahertz conductivity in the crystalline states of phase change materials  

SciTech Connect (OSTI)

THz and DC losses in crystalline states of GeSbTe and AgInSbTe phase-change material systems are re-examined and discussed. Although a simple free carrier transport has been assumed so far in the GeSbTe (GST) system, it is shown through recent experimental results that a series sequence of intragrain and intergrain (tunneling) transport, as recently formulated in Shimakawa et al., “The origin of non-Drude terahertz conductivity in nanomaterials,” Appl. Phys. Lett. 100, 132102 (2012) may dominate the electronic transport in the commercially utilized GST system, producing a non-Drude THz conductivity. The extracted physical parameters such as the free-carrier density and mobility are significantly different from those obtained from the Drude law. These physical parameters are consistent with those obtained from the DC loss data, and provide further support for the model. Negative temperature coefficient of resistivity is found even in the metallic state, similar to amorphous metals, when the mean free path is short. It is shown that the concept of minimum metallic conductivity, often used in the metal-insulator transition, cannot be applied to electronic transport in these materials.

Shimakawa, Koichi [Department of General and Inorganic Chemistry, University of Pardubice, Pardubice (Czech Republic); Department of Electrical Engineering, Gifu University (Japan); Wagner, Tomas; Frumar, Miloslav [Department of General and Inorganic Chemistry, University of Pardubice, Pardubice (Czech Republic); Kadlec, Filip; Kadlec, Christelle [Institute of Physics, Academy of Sciences of the Czech Republic, Prague (Czech Republic); Kasap, Safa [Department of Electrical Engineering, University of Saskatchewan, Saskatoon SK S7N 5A9 (Canada)

2013-12-21T23:59:59.000Z

218

Experiment and simulation of a LiFePO4 battery pack with a passive thermal management system using composite phase change material and graphite sheets  

Science Journals Connector (OSTI)

Abstract A passive thermal management system (TMS) for LiFePO4 battery modules using phase change material (PCM) as the heat dissipation source to control battery temperature rise is developed. Expanded graphite matrix and graphite sheets are applied to compensate low thermal conductivity of PCM and improve temperature uniformity of the batteries. Constant current discharge and mixed charge-discharge duties were applied on battery modules with and without PCM on a battery thermal characteristics test platform. Experimental results show that PCM cooling significantly reduces the battery temperature rise during short-time intense use. It is also found that temperature uniformity across the module deteriorates with the increasing of both discharge time and current rates. The maximum temperature differences at the end of 1C and 2C-rate discharges are both less than 5°C, indicating a good performance in battery thermal uniformity of the passive TMS. Experiments on warm-keeping performance show that the passive TMS can effectively keep the battery within its optimum operating temperature for a long time during cold weather uses. A three dimensional numerical model of the battery pack with the passive TMS was conducted using ANSYS Fluent. Temperature profiles with respect to discharging time reveal that simulation shows good agreement with experiment at 1C-discharge rate.

Chunjing Lin; Sichuan Xu; Guofeng Chang; Jinling Liu

2014-01-01T23:59:59.000Z

219

Experimentation of a High Temperature Thermal Energy Storage Prototype Using Phase Change Materials for the Thermal Protection of a Pressurized Air Solar Receiver  

Science Journals Connector (OSTI)

Abstract The work addresses the issue of fast variations of temperature of a central solar receiver under cloud covering. A specific attention is paid to the situation of Hybrid Solar Gas Turbine (HSGT) systems using pressurized air as Heat Transfer Fluid (HTF), as it is considered in the Pegase project (France). A Thermal Energy Storage (TES) unit integrated in the receiver is proposed for smoothing the variation of temperature. The technology is based on the utilization of both Phase Change Material (PCM) and metallic fins in order to enhance charge and discharge capability of the storage unit. A test-bench is designed with copper fins and is experienced with paraffin wax and with Li2CO3 successively as PCMs. In the same time, the test unit is modeled and the charging and discharging modes are simulated. The results show that the full charging is achieved in about 4 hours starting from 700 °C when the receiver is maintained at 900 °C, whereas the discharge from 900 °C to 700 °C is achieved in 2.5 hours.

D. Verdier; A. Ferričre; Q. Falcoz; F. Siros; R. Couturier

2014-01-01T23:59:59.000Z

220

The use of phase change materials in domestic heat pump and air-conditioning systems for short term storage: A review  

Science Journals Connector (OSTI)

Abstract Heat pumps for space heating and cooling are a mature and highly efficient technology that can take advantage of renewable energies. They can also provide energy savings by load shifting when they operate together with thermal energy storage (TES). This paper presents a literature review of TES systems using phase change materials (PCM) potentially applicable to domestic heat pumps used in residential and administrative buildings. The paper describes the systems proposed by the different authors and presents the main conclusions of the studies. The TES systems presented are not only used as energy storage to shift the load demand but also for other applications such as heat recovery or defrosting in air-conditioners. The PCM have the suitable melting temperature to work together with standard heat pumps in each application. Moreover, some systems where the heat pump is coupled to latent heat thermal energy storage (LHTES) units and other energy sources or where the TES system is incorporated in a radiant floor or air distribution system have also been included.

Pere Moreno; Cristian Solé; Albert Castell; Luisa F. Cabeza

2014-01-01T23:59:59.000Z

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


221

1.7 Gbit/in.2 gray-scale continuous-phase-change femtosecond image storage Q. Wang, J. Maddock, E. T. F. Rogers, T. Roy, C. Craig, K. F. Macdonald, D. W. Hewak, and N. I. Zheludev  

E-Print Network [OSTI]

. T. F. Rogers, T. Roy, C. Craig, K. F. Macdonald, D. W. Hewak, and N. I. Zheludev Citation: Applied-phase-change femtosecond image storage Q. Wang,1,2,a) J. Maddock,1 E. T. F. Rogers,1 T. Roy,1 C. Craig,1 K. F. Macdonald,1

Zheludev, Nikolay

222

Theoretical and Experimental Thermal Performance Analysis of Building Shell Components Containing Blown Fiber Glass Insulation Enhanced with Phase Change Material (PCM)  

SciTech Connect (OSTI)

Different types of Phase Change Materials (PCMs) have been tested as dynamic components in buildings during the last 4 decades. Most historical studies have found that PCMs enhance building energy performance. Some PCM-enhanced building materials, like PCM-gypsum boards or PCM-impregnated concretes have already found their limited applications in different countries. Today, continued improvements in building envelope technologies suggest that throughout Southern and Central US climates, residences may soon be routinely constructed with PCM in order to maximize insulation effectiveness and maintain low heating and cooling loads. The proposed paper presents experimental and numerical results from thermal performance studies. These studies focus on blown fiber glass insulation modified with a novel spray-applied microencapsulated PCM. Experimental results are reported for both laboratory-scale and full-size building elements tested in the field. In order to confirm theoretical predictions, PCM enhanced fiber glass insulation was evaluated in a guarded hot box facility to demonstrate heat flow reductions when one side of a test wall is subjected to a temperature increase. The laboratory work showed reductions in heat flow of 30% due to the presence of approximately 20 wt % PCM in the insulation. Field testing of residential attics insulated with blown fiber glass and PCM was completed in Oak Ridge, Tennessee. Experimental work was followed by detailed whole building EnergyPlus simulations in order to generate energy performance data for different US climates. In addition, a series of numerical simulations and field experiments demonstrated a potential for application of a novel PCM fiber glass insulation as enabling technology to be utilized during the attic thermal renovations.

Miller, William A [ORNL] [ORNL; Kosny, Jan [ORNL] [ORNL; Yarbrough, David W [ORNL] [ORNL; Childs, Phillip W [ORNL] [ORNL; Shrestha, Som S [ORNL] [ORNL; Atchley, Jerald Allen [ORNL] [ORNL; Bianchi, Marcus V [ORNL] [ORNL; Smith, John B [ORNL] [ORNL; Fellinger, Thomas [ORNL] [ORNL; Kossecka, Elizabeth [Institute of Fundamental Technological Research, Polish Academy of Sciences] [Institute of Fundamental Technological Research, Polish Academy of Sciences; Lee, Edwin S [ORNL] [ORNL

2010-01-01T23:59:59.000Z

223

ECO2M: A TOUGH2 Fluid Property Module for Mixtures of Water, NaCl, and CO2, Including Super- and Sub-Critical Conditions, and Phase Change Between Liquid and Gaseous CO2  

SciTech Connect (OSTI)

ECO2M is a fluid property module for the TOUGH2 simulator (Version 2.0) that was designed for applications to geologic storage of CO{sub 2} in saline aquifers. It includes a comprehensive description of the thermodynamics and thermophysical properties of H{sub 2}O - NaCl - CO{sub 2} mixtures, that reproduces fluid properties largely within experimental error for temperature, pressure and salinity conditions in the range of 10 C {le} T {le} 110 C, P {le} 600 bar, and salinity from zero up to full halite saturation. The fluid property correlations used in ECO2M are identical to the earlier ECO2N fluid property package, but whereas ECO2N could represent only a single CO{sub 2}-rich phase, ECO2M can describe all possible phase conditions for brine-CO{sub 2} mixtures, including transitions between super- and sub-critical conditions, and phase change between liquid and gaseous CO{sub 2}. This allows for seamless modeling of CO{sub 2} storage and leakage. Flow processes can be modeled isothermally or non-isothermally, and phase conditions represented may include a single (aqueous or CO{sub 2}-rich) phase, as well as two-and three-phase mixtures of aqueous, liquid CO{sub 2} and gaseous CO{sub 2} phases. Fluid phases may appear or disappear in the course of a simulation, and solid salt may precipitate or dissolve. TOUGH2/ECO2M is upwardly compatible with ECO2N and accepts ECO2N-style inputs. This report gives technical specifications of ECO2M and includes instructions for preparing input data. Code applications are illustrated by means of several sample problems, including problems that had been previously solved with TOUGH2/ECO2N.

Pruess, K.

2011-04-01T23:59:59.000Z

224

Phase five  

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

Phase five Phase five 1663 Los Alamos science and technology magazine Latest Issue:November 2013 All Issues » submit Phase five Los Alamos physicists have conclusively demonstrated the existence of a new phase of matter. November 25, 2013 Phase five Scientists still have more to learn about the exotic physics of specialty materials. What makes the cuprates special? How about a new phase of matter. Ceramic metals known as cuprates have mystified physicists for decades. They exhibit a variety of distinct phases of matter, each with its own specific properties, including a phase bearing an exotic type of magnetism, a high-temperature superconducting phase, an ordinary metal phase, a poorly understood and weird metallic phase simply called a strange metal, and an equally poorly understood metallic phase known as the pseudogap. The

225

PNNL Expert Alan Zacher Discusses Bio-Based Fuels  

ScienceCinema (OSTI)

Chemical Engineer Alan Zacher discusses the process for creating fuels from renewable sources in an efficient manner.

Alan Zacher

2012-12-31T23:59:59.000Z

226

Reactive Distillation for Esterification of Bio-based Organic...  

Office of Scientific and Technical Information (OSTI)

bench-scale column and 1.0 liter for the pilot-scale column. Each column has two feed pumps to dispense feed solutions to the column at a controlled rate. The columns have...

227

Reactive Distillation for Esterification of Bio-based Organic...  

Office of Scientific and Technical Information (OSTI)

introduction of feed, and sample withdrawal. The columns are wrapped with electric heating tapes that are controlled by surface thermocouples and Omega controllers to...

228

Temperaturregulierend: Latentwärmespeicher, Phase Change Material (PCM)  

Science Journals Connector (OSTI)

Die Temperaturregulierung von Gebäuden verschlingt sowohl zum Heizen als auch zur Kühlung reichlich Energie und produziert damit CO2.... Der dafür erforderliche Energieverbrauch kann mittels Nanotechnologie deutl...

2008-01-01T23:59:59.000Z

229

Arnold Schwarzenegger A PHASE CHANGE MATERIAL  

E-Print Network [OSTI]

-2006-026 #12;Prepared By: Leading Technology Design, Inc. Randy Clarksean, Ph.D., P.E. New York Mills, MN 56567 Designs, Inc. P.O. Box N 106 North Boardman Ave. New York Mills, MN 56567 Phone: (218) 385-3750 Email CONDITIONING LOADS Prepared For: California Energy Commission Public Interest Energy Research Program Prepared

230

phase coherence  

Science Journals Connector (OSTI)

The state in which two signals, such as electronic or optical signals, maintain (a) a fixed phase relationship with each other or (b) a fixed phase relationship with a third signal that can serve as a referenc...

2001-01-01T23:59:59.000Z

231

Changing quantum reference frames  

E-Print Network [OSTI]

We consider the process of changing reference frames in the case where the reference frames are quantum systems. We find that, as part of this process, decoherence is necessarily induced on any quantum system described relative to these frames. We explore this process with examples involving reference frames for phase and orientation. Quantifying the effect of changing quantum reference frames serves as a first step in developing a relativity principle for theories in which all objects including reference frames are necessarily quantum.

Matthew C. Palmer; Florian Girelli; Stephen D. Bartlett

2014-05-21T23:59:59.000Z

232

Double acting stirling engine phase control  

DOE Patents [OSTI]

A mechanical device for effecting a phase change between the expansion and compression volumes of a double-acting Stirling engine uses helical elements which produce opposite rotation of a pair of crankpins when a control rod is moved, so the phase between two pairs of pistons is changed by +.psi. and the phase between the other two pairs of pistons is changed by -.psi.. The phase can change beyond .psi.=90.degree. at which regenerative braking and then reversal of engine rotation occurs.

Berchowitz, David M. (Scotia, NY)

1983-01-01T23:59:59.000Z

233

Change Log  

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

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

234

Numerical Simulation of Liquid-Solid, Solid-Liquid Phase Change Using Finite Element Method in h,p,k Framework with Space-Time Variationally Consistent Integral Forms  

E-Print Network [OSTI]

: cp@T@t r (krTs) = 0 8(x;t) 2 sxt = sx t = sx (0; ) (2.1) Liquid Phase: cp@T@t r (krTl) = 0 8(x;t) 2 lxt = lx t = lx (0; ) (2.2) At the interface: Lfvn = [( krTs) ( krTl)] n 8(x;t) 2 x;t = x t (2.3) 10 in which sx and lx are solid... and liquid spatial domains, x(t) = sxT lx is the interface between the two phases, Lf is the latent heat of fusion,n is the unit exterior normal from the solid phase at the interface, and vn is the normal velocity of the interface. Subscripts s and l...

Truex, Michael

2010-07-21T23:59:59.000Z

235

An upper bound on the coarsening rate for mushy zones in a phase-field model  

E-Print Network [OSTI]

Phase field models are used to describe the solid-liquid phase transition of a pure material by means times and the energetic contributions of temperature fluctuations compared to phase changes. We supply of phase change processes initiated by spinodal decomposi- tion, or certain heterogeneously nucleated phase

Dai, Shibin

236

PHASE TRANSITIONS, CRITICAL PHENOMENA AND EXACTLY SOLVABLE LATTICE MODELS  

E-Print Network [OSTI]

of common everyday expe- rience. If we boil a kettle of water we observe a change of phase from a liquid in a pond change phase from a liquid state to solid ice. Lastly, if a horseshoe magnet is heated passes through the boling (melting) point. Figure 3 shows the phase diagram of a ferromagnetic material

Pearce, Paul A.

237

Continuous Change Institutional Change Principle  

Broader source: Energy.gov [DOE]

Because it takes time to establish institutional change, Federal agencies need multiyear plans that continuously work to achieve, reinforce, and improve significant and persistent sustainability...

238

Two-phase flow studies  

SciTech Connect (OSTI)

The two-phase flow program is directed at understanding the hydrodynamics of two-phase flows. The two-phase flow regime is characterized by a series of flow patterns that are designated as bubble, slug, churn, and annular flow. Churn flow has received very little scientific attention. This lack of attention cannot be justified because calculations predict that the churn flow pattern will exist over a substantial portion of the two-phase flow zone in producing geothermal wells. The University of Houston is experimentally investigating the dynamics of churn flow and is measuring the holdup over the full range of flow space for which churn flow exists. These experiments are being conducted in an air/water vertical two-phase flow loop. Brown University has constructed and is operating a unique two-phase flow research facility specifically designed to address flow problems of relevance to the geothermal industry. An important feature of the facility is that it is dedicated to two-phase flow of a single substance (including evaporation and condensation) as opposed to the case of a two-component two-phase flow. This facility can be operated with horizontal or vertical test sections of constant diameter or with step changes in diameter to simulate a geothermal well profile.

Hanold, R.J.

1983-12-01T23:59:59.000Z

239

Loss of spatial phase relationships in extrafoveal vision  

Science Journals Connector (OSTI)

... confused with encoding the position of points within an image, although the two descriptions are interrelated. The importance of phase in signals is obvious from the intelligibility of phase-only ... . Nevertheless, there is still confusion as to the exact role of phase in visual processing, mainly owing to the fact that phase modulation changes both the spectral composition of ...

Ingo Rentschler; Bernhard Treutwein

1985-01-24T23:59:59.000Z

240

Thermal Performance of Microencapsulated Phase Material (MPCM) Slurry in a Coaxial Heat Exchanger  

E-Print Network [OSTI]

Microencapsulated phase change material (MPCM) slurries and coil heat exchangers had been recently studied separately as enhancers of convective heat transfer processes. Due to the larger apparent heat related to the phase change process...

Yu, Kun

2014-05-08T23:59:59.000Z

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


241

In Situ TEM Observation of Heterogeneous Phase Transition of a Constrained  

E-Print Network [OSTI]

to understand how external stresses imposed on the materials affect their phase change performance. It has been) is an attractive material that exhibits thermoelectricity, structural phase transi- tions, and magnetoresistance show quite distinct phase transition behaviors from the reversible phase change of bulk Ag2Te. A finite

Ihee, Hyotcherl

242

Enhancement of Phase Sensitivity by Exploring Slow Light in Photonic Crystals  

E-Print Network [OSTI]

of signal by ir(*) after propagating through length L of some material, the induced phase change is then it: * A phase change of it can be used to switch the signal on-off by placing the material in an interferometer 94305 We demonstrate how dramatic increases in the induced phase shifts caused by small changes

243

Photonic-crystal slow-light enhancement of nonlinear phase sensitivity  

E-Print Network [OSTI]

material, the induced phase change is then 2 L n/ AIR L AIR/2 n, requiring the size of the device-crystal systems, can dramatically increase the induced phase shifts caused by small changes in the index to be millimeters or more. (A phase change of can be used to switch the signal on or off by one's placing

244

Climate Change 2007: Mitigation of Climate Change.  

E-Print Network [OSTI]

2007: Mitigation of Climate Change. Full report. WorkingIntergovernmental Panel on Climate Change www.webcda.it LaIntergovernmental Panel on Climate Change”. Il Rapporto

Schiavon, Stefano; Zecchin, Roberto

2007-01-01T23:59:59.000Z

245

Global Climate Change,Global Climate Change, Land Cover Change, andLand Cover Change, and  

E-Print Network [OSTI]

1 Global Climate Change,Global Climate Change, Land Cover Change, andLand Cover Change Changes · Due to ­ Climate Change ­ Land Cover / Land Use Change ­ Interaction of Climate and Land Cover Change · Resolution ­ Space ­ Time Hydro-Climatic Change · Variability vs. Change (Trends) · Point data

246

Signatures of an electronic nematic phase at the isotropic-nematic phase transition  

Science Journals Connector (OSTI)

The electronic nematic phase occurs when the point-group symmetry of the lattice structure is broken, due to electron-electron interactions. We study a model for the nematic phase on a square lattice with emphasis on the phase transition between isotropic and nematic phases within mean-field theory. We find the transition to be first order, with dramatic changes in the Fermi-surface topology accompanying the transition. Furthermore, we study the conductivity tensor and Hall constant as probes of the nematic phase and its transition. The relevance of our findings to Hall resistivity experiments in the high-Tc cuprates is discussed.

Hae-Young Kee; Eugene H. Kim; Chung-Hou Chung

2003-12-11T23:59:59.000Z

247

CrowdPhase: crowdsourcing the phase problem  

Science Journals Connector (OSTI)

The idea of attacking the phase problem by crowdsourcing is introduced. Using an interactive, multi-player, web-based system, participants work simultaneously to select phase sets that correspond to better electron-density maps in order to solve low-resolution phasing problems.

Jorda, J.

2014-05-23T23:59:59.000Z

248

Nanoscale Thermotropic Phase Transitions Enhance Photothermal Microscopy Signals  

E-Print Network [OSTI]

the material undergoes a phase transition. Herein, we show that thermotropic phase transitions in 4-Cyano-41 Nanoscale Thermotropic Phase Transitions Enhance Photothermal Microscopy Signals A. Nicholas G-objects in various environments. It uses a photo-induced change in the refractive index of the environment. Taking

Boyer, Edmond

249

Quantum Spin Hall Phases  

Science Journals Connector (OSTI)

......even it is called the weak topological in- sulator (WTI). The STI and WTI correspond to the QSH and I phases, respectively...are used to distinguish various phases in the STI or WTI phases, and each phase can be associated with a mod......

Shuichi Murakami

2008-06-01T23:59:59.000Z

250

Method and apparatus for optical phase error correction  

DOE Patents [OSTI]

The phase value of a phase-sensitive optical device, which includes an optical transport region, is modified by laser processing. At least a portion of the optical transport region is exposed to a laser beam such that the phase value is changed from a first phase value to a second phase value, where the second phase value is different from the first phase value. The portion of the optical transport region that is exposed to the laser beam can be a surface of the optical transport region or a portion of the volume of the optical transport region. In an embodiment of the invention, the phase value of the optical device is corrected by laser processing. At least a portion of the optical transport region is exposed to a laser beam until the phase value of the optical device is within a specified tolerance of a target phase value.

DeRose, Christopher; Bender, Daniel A.

2014-09-02T23:59:59.000Z

251

REQUEST FOR CHANGE OF RECORD Name Change  

E-Print Network [OSTI]

(ex. from variation to legal name) or Add Middle Name/Initial ­ Copy of birth certificate, or valid U. Documentation Required for Date of Birth Changes: Copy of birth certificate, or valid U.S. passportREQUEST FOR CHANGE OF RECORD Name Change Social Security Number Change Date of Birth Change

252

Pressure-induced phase transformation of In2Se3 Anya M. Rasmussen,1  

E-Print Network [OSTI]

13 February 2013) In2Se3 has potential as a phase-change material for memory applications and the defect wurtzite c phase.1 Recently, In2Se3 has received attention as a phase-change material that could be used in phase-change random access memory (PRAM) applications.2,3 In2Se3 may be preferable over Ge2Sb2

McCluskey, Matthew

253

Metamorphosis: Phases of UF{sub 6}  

SciTech Connect (OSTI)

A 15-minute videotape is presented. The subject matter is 150 grams of UF{sub 6} sealed in a glass tube. Close-up views show the UF{sub 6} as phase changes are effected by the addition or removal of heat from the closed system. The solid-to-liquid transition is shown as heat is added, both slowly and rapidly. The solid phases which result from freezing and from desublimation are contrasted. In the solid state, uranium hexafluoride is a nearly-white, dense crystalline solid. The appearance of this solid depends on whether it is formed by freezing from the liquid or by desublimation from the vapor phase. If frozen from the liquid, the solid particles take the form of irregularly shaped coarse grains, while the solid product of desublimation tends to be a rather formless mass without individually distinguishable particles. The changes in state are presented in terms of the UF{sub 6} phase diagram.

Dyer, R.H. [Department of Energy, Oak Ridge, TN (United States)

1991-12-31T23:59:59.000Z

254

Quark Phase Transition Parameters and $?$-Meson Field in RMF Theory  

E-Print Network [OSTI]

The deconfinement phase transition from hadronic matter to quark matter in the interior of compact stars is investigated. The hadronic phase is described in the framework of relativistic mean-field (RMF) theory, when also the scalar- isovector $\\delta$-meson effective field is taken into account. To describe a quark phase the MIT bag model is used. The changes of the mixed phase threshold parameters caused by the presence of $\\delta$-meson field are investigated.

G. B. Alaverdyan

2009-07-23T23:59:59.000Z

255

Phase-change thermal energy storage: Final subcontract report  

SciTech Connect (OSTI)

The research and development described in this document was conducted within the US Department of Energy's Solar Thermal Technology Program. The goal of this program is to advance the engineering and scientific understanding of solar thermal technology and to establish the technology base from which private industry can develop solar thermal power production options for introduction into the competitive energy market. Solar thermal technology concentrates the solar flux using tracking mirrors or lenses onto a receiver where the solar energy is absorbed as heat and converted into electricity or incorporated into products as process heat. The two primary solar thermal technologies, central receivers and distributed receivers, employ various point and line-focus optics to concentrate sunlight. Current central receiver systems use fields of heliostats (two-axes tracking mirrors) to focus the sun's radiant energy onto a single, tower-mounted receiver. Point focus concentrators up to 17 meters in diameter track the sun in two axes and use parabolic dish mirrors or Fresnel lenses to focus radiant energy onto a receiver. Troughs and bowls are line-focus tracking reflectors that concentrate sunlight onto receiver tubes along their focal lines. Concentrating collector modules can be used alone or in a multimodule system. The concentrated radiant energy absorbed by the solar thermal receiver is transported to the conversion process by a circulating working fluid. Receiver temperatures range from 100{degree}C in low-temperature troughs to over 1500{degree}C in dish and central receiver systems. 12 refs., 119 figs., 4 tabs.

Not Available

1989-11-01T23:59:59.000Z

256

Phase change materials: From material science to novel storage devices  

Science Journals Connector (OSTI)

In recent years, non-volatile solid state memories have in many applications replaced magnetic hard disk drives. While the most popular and successful non-volatile memory is the “FLASH” random access memory, seve...

M. Wuttig; C. Steimer

2007-06-01T23:59:59.000Z

257

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network [OSTI]

the discharge of thermal energy storage without releasingto low-energy cooling sources. Large thermal storage devices

Feustel, H.E.

2011-01-01T23:59:59.000Z

258

PHASE-CHANGE TECHNOLOGY AND THE FUTURE OF MAIN MEMORY  

E-Print Network [OSTI]

. Moreover, the resulting thermal stress within the storage element degrades current-injection con they don't require precise charge placement and control. Programming mechanisms such as current injection to process scal- ing. During writes, an access transistor injects current into the storage material and ther

259

Optimized Structures for Low-Profile Phase Change Thermal Spreaders  

E-Print Network [OSTI]

and Wang, Y.X. , 2008, “Fluid Flow and Heat Transfer in thewick structure. Heat transfer through the fluid and solidFluids, “Safe Sustainable Cooling Performance – Dielectric heat transfer

Sharratt, Stephen A.

2012-01-01T23:59:59.000Z

260

Project Profile: Encapsulated Phase Change Material in Thermal...  

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

(PCM salt) in a suitable shell material. Large numbers of these PCM capsules provide high-heat transfer surface and store heat as sensible and latent heat of fusion of salt. The...

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


261

Optimized Structures for Low-Profile Phase Change Thermal Spreaders  

E-Print Network [OSTI]

of High-Thermal-Conductivity Aluminum Nitride Ceramics”,for a ceramic isolating material and the associated thermal

Sharratt, Stephen A.

2012-01-01T23:59:59.000Z

262

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network [OSTI]

implemented in gypsum board, plaster or other wall-coveringimbedded in gypsum board, plaster or other wall-covering7 billion square meters of plaster board are being produced

Feustel, H.E.

2011-01-01T23:59:59.000Z

263

Phase Change Materials for Thermal Regulation of Building Integrated Photovoltaics.  

E-Print Network [OSTI]

?? In outdoor deployed photovoltaics (PV), standard test conditions (STC) of 25 °C PV temperature, 1000 Wm-2 solar radiation intensity and 1.5 air-mass rarely prevail.… (more)

Hassan, Ahmad, (Thesis)

2010-01-01T23:59:59.000Z

264

Space observations of cold-cloud phase change  

Science Journals Connector (OSTI)

...Planetary Sciences, Massachusetts Institute of Technology...be suitable for the solar insolation used...global and annual mean solar radiation value, 340...smoke and dust upon solar radiation...Planetary Sciences, Massachusetts Institute of Technology...

Yong-Sang Choi; Richard S. Lindzen; Chang-Hoi Ho; Jinwon Kim

2010-01-01T23:59:59.000Z

265

Englacial phase changes and intergranular flow above subglacial lakes  

E-Print Network [OSTI]

contributed to the large quantities of refrozen lake water found above Vostok lake, Antarctica, and the accreted ice layers seen in borehole images from Antarctic ice streams (Carsey and others, 2002). It has even been suggested that refrozen vein water may contribute to drilling problems such as those

Rempel, Alan W.

266

Storage Techniques in Flash Memories and Phase-change Memories  

E-Print Network [OSTI]

advice on research, writing, and presentation. Without Andrew?s encouragement and help during the difficult times in my PhD study, this dissertation would not have been possible. I would like to thank Dr. Jennifer Welch, Dr. Jianer Chen, and Dr. Alex... . . . . . . . . . . . . . . . . 4 1. Principles and Operations in Flash Memories . . . . . 4 a. Read Operation . . . . . . . . . . . . . . . . . . . 5 b. Programming Operation . . . . . . . . . . . . . . 5 c. Erase Operation . . . . . . . . . . . . . . . . . . . 6 d. Decreasing...

Li, Hao

2010-10-12T23:59:59.000Z

267

Ultrafast phase-change logic device driven by melting processes  

Science Journals Connector (OSTI)

...disorder generated by thermal excitations, e...rings during the initial thermal...provides the electrical and thermal insulation. Device Fabrication...picosecond-pulse generator has the specifications of pulse durations ranging...

Desmond Loke; Jonathan M. Skelton; Wei-Jie Wang; Tae-Hoon Lee; Rong Zhao; Tow-Chong Chong; Stephen R. Elliott

2014-01-01T23:59:59.000Z

268

Thermal phase change actuator for self-tracking solar concentration  

Science Journals Connector (OSTI)

We present a proof of principle demonstration of a reversible in-plane actuator activated by focused sunlight, and describe a concept for its use as a self-tracking mechanism in a...

Tremblay, E J; Loterie, D; Moser, C

2012-01-01T23:59:59.000Z

269

Off-peak cooling using phase change material  

E-Print Network [OSTI]

The electric utilities in the United States are faced with continued rapid growth in electrical demand. The traditional response to growth in demand has been the expansion of generating capacity. However, economic, ...

Benton, Charles Crisp

1979-01-01T23:59:59.000Z

270

Constraining the kinetics of mantle phase changes with seismic data  

Science Journals Connector (OSTI)

......excluded. This does not imply that accounting...10 km thick layer does not imply that seismic...transformation loop does not affect S waves...thermochemical calculation, and geophysical...National University Electronic Press, Canberra...Earth Physics, A Handbook of Physical Constants......

S. Durand; F. Chambat; J. Matas; Y. Ricard

2012-06-01T23:59:59.000Z

271

Optimized Structures for Low-Profile Phase Change Thermal Spreaders  

E-Print Network [OSTI]

Fluids, “3M Novec 72DE Engineering Fluid,” Accessed NovemberFluids with Biporous Evaporators”, Journal of Thermal Science and Engineering

Sharratt, Stephen A.

2012-01-01T23:59:59.000Z

272

Project Profile: Indirect, Dual-Media, Phase Changing Material...  

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

thus more energy can be stored in a smaller volume of material. The design employs a flat panel heat exchanger submerged in molten salt with a vibratory mechanism to prevent the...

273

Optimized Structures for Low-Profile Phase Change Thermal Spreaders  

E-Print Network [OSTI]

clockwise: cluster geometry, pie, sun, and baseline-post.cylinders, pies, and clusters…………………………………………………………………………baseline cylindrical posts, b) pie-cylinders, c) clusters of

Sharratt, Stephen A.

2012-01-01T23:59:59.000Z

274

HEAT TRANSFER IN POROUS MEDIA WITH FLUID PHASE CHANGES  

E-Print Network [OSTI]

R. T. , and Kesaran, K. : "Heat Transfer From CylindersProc. of 4th Internal. Heat Transfer Conference, Paris-Cotter, T. P. : "Theory of Heat Pipe," Report No. LA-3246-

Su, Ho-Jeen.

2010-01-01T23:59:59.000Z

275

Quantum Nature of a Nuclear Phase Transition  

Science Journals Connector (OSTI)

At finite temperatures and low densities, nuclei may undergo a phase change similar to a classical liquid-gas phase transition. Temperature is the control parameter while density and pressure are the conjugate variables. In the nucleus the difference between the proton and neutron concentrations acts as an additional order parameter, for which the symmetry potential is the conjugate variable. We present experimental results which reveal the N/Z dependence of the phase transition and discuss possible implications of these observations in terms of the Landau free energy description of critical phenomena.

A. Bonasera; Z. Chen; R. Wada; K. Hagel; J. Natowitz; P. Sahu; L. Qin; S. Kowalski; Th. Keutgen; T. Materna; T. Nakagawa

2008-09-18T23:59:59.000Z

276

Review: Global Climate Change  

E-Print Network [OSTI]

introduction to global climate change, the greenhouseReview: Global Climate Change: A Primer By Orrin H PilkeyPilkey, Keith C. Global Climate Change: a primer. Durham,

Smith, Jennifer

2013-01-01T23:59:59.000Z

277

Infrastructure Institutional Change Principle  

Broader source: Energy.gov [DOE]

Research shows that changes in infrastructure prompt changes in behavior (for better or worse). Federal agencies can modify their infrastructure to promote sustainability-oriented behavior change,...

278

Lab announces security changes  

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

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

279

A-B Phase Transition and Pinning of Phase Boundary of Superfluid 3He in Aerogel  

SciTech Connect (OSTI)

Phase transition in superfluid 3He in aerogel has been studied by NMR. Above 19 bar, we have clearly observed the A-like and B-like phases by following changes in the NMR lineshapes and resonance frequencies. There is a wide temperature region in which the A-like phase and the B-like phase coexist, extending from near the superfluid transition temperature T{sub c}{sup aero} to the lowest temperature of coexistence, T{sub AB}{sup aero}, below which only the B-like phase exists. There are two temperature regions, only in which the phase conversion occurs. Both regions are a few tens of {mu}K wide, the upper region being just below T{sub c}{sup aero} and the lower one just above T{sub AB}{sup aero}. In cooling down and warming up with the two phases in coexistence, no phase conversion occurs between the two regions. The phase boundary between the A-like phase and B-like phase cannot move in aerogel due to strong pinning by inhomogenities of aerogel.

Ishikawa, Osamu; Kado, Ryusuke; Obara, Ken; Yano, Hideo; Hata, Tohru [Graduate School of Science, Osaka City University, Osaka 558-8585 (Japan); Nakagawa, Hisashi [Metrology Institute of Japan, Advanced Industrial Science and Technology Tsukuba, 305-8563 (Japan); Yokogawa, Hiroshi; Yokoyama, Masaru [Matsushita Electric Works Ltd. Kadoma, Osaka, 571-0500 (Japan)

2006-09-07T23:59:59.000Z

280

Phase-Transfer Catalysts  

Science Journals Connector (OSTI)

In previous chapters we learned that a phase-transfer catalyst must have two particular chemical functions to be successful, that is, it must rapidly transfer one of the reactant species into the normal phase ...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

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


281

Piecewise Linear Phase Transitions  

E-Print Network [OSTI]

It is shown how simple assumptions lead to piecewise linear behavior, which is observed in certain phase transitions.

Joseph B. Keller

2007-11-26T23:59:59.000Z

282

Analysis of a Material Phase Shifting Element in an Atom Interferometer  

E-Print Network [OSTI]

Analysis of a Material Phase Shifting Element in an Atom Interferometer John D. Perreault of the change in phase and coherence of matter waves as they pass within 25 nm of the grating bar surfaceW) interaction [5] changed the relative intensities of the diffraction orders. More recently the atom wave phase

Cronin, Alex D.

283

Multimedia Phase-Spaces  

Science Journals Connector (OSTI)

Dynamic phase-spaces are suggested as a way of designing and implementing interactive multimedia systems. A dynamic phase-space is a space of properties overlayed with dynamics. The space is “decorated” with multimedia resources such ... Keywords: catastrophe theory, dynamics, installation, interactive narrative, museums, phase-space

Peter Břgh Andersen

1998-05-01T23:59:59.000Z

284

Climate Change and Extinctions  

E-Print Network [OSTI]

Lectures presents: Climate Change and Extinctions Happening2013. He will present a climate change extinction model that

Sinervo, Barry

2013-01-01T23:59:59.000Z

285

change_address_111609  

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

CHANGE OF ADDRESS and EMERGENCY NOTIFICATION CHANGE OF ADDRESS and EMERGENCY NOTIFICATION TO: HUMAN RESOURCES DATE: Z# Social Security # Print First Name Print Middle Name or Initial Print Last Name (Currently in Payroll System) Complete appropriate changes: NAME CHANGE: Print Name Change to ADDRESS CHANGE: Mailing Address City State Zip

286

Climate Change Scoping Plan  

E-Print Network [OSTI]

Climate Change Scoping Plan a amework for change as approved Prepared by the California AirBackgroundBackgroundBackground ............................................................................................................................................................................................................................................................................................................................................................................................................ 4444 1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California

287

Climate Change Scoping Plan  

E-Print Network [OSTI]

Climate Change Scoping Plan a amework for change Prepared by the California Air Resources BoardBackgroundBackgroundBackground ............................................................................................................................................................................................................................................................................................................................................................................................................ 4444 1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California

288

Second-quantized formulation of geometric phases  

SciTech Connect (OSTI)

The level crossing problem and associated geometric terms are neatly formulated by the second-quantized formulation. This formulation exhibits a hidden local gauge symmetry related to the arbitrariness of the phase choice of the complete orthonormal basis set. By using this second-quantized formulation, which does not assume adiabatic approximation, a convenient exact formula for the geometric terms including off-diagonal geometric terms is derived. The analysis of geometric phases is then reduced to a simple diagonalization of the Hamiltonian, and it is analyzed both in the operator and path-integral formulations. If one diagonalizes the geometric terms in the infinitesimal neighborhood of level crossing, the geometric phases become trivial (and thus no monopole singularity) for arbitrarily large but finite time interval T. The integrability of Schroedinger equation and the appearance of the seemingly nonintegrable phases are thus consistent. The topological proof of the Longuet-Higgins' phase-change rule, for example, fails in the practical Born-Oppenheimer approximation where a large but finite ratio of two time scales is involved and T is identified with the period of the slower system. The difference and similarity between the geometric phases associated with level crossing and the exact topological object such as the Aharonov-Bohm phase become clear in the present formulation. A crucial difference between the quantum anomaly and the geometric phases is also noted.

Deguchi, Shinichi; Fujikawa, Kazuo [Institute of Quantum Science, College of Science and Technology, Nihon University, Chiyoda-ku, Tokyo 101-8308 (Japan)

2005-07-15T23:59:59.000Z

289

Changing Faces, Changing Government | Department of Energy  

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

Changing Faces, Changing Government Changing Faces, Changing Government Changing Faces, Changing Government May 24, 2012 - 3:24pm Addthis Changing Faces, Changing Government What are the key facts? The Energy Department incorporated metrics into funding programs to track minority participation; conducted robust outreach to business associations, utilizing a corporate enterprise system to capture and track small business awards to AAPI-owned businesses; incorporated AAPI businesses into its Small Business Advisory Group; and leveraged its Office of Small and Disadvantaged Business Utilization to target areas of high Asian American populations where there are DOE offices and facilities. Editor's Note: This blog was originally posted by the White House Initiative on Asian Americans and Pacific Islanders, by their Deputy

290

Electrically and magnetically tunable phase shifters based on a barium strontium titanate-yttrium iron garnet layered structure  

E-Print Network [OSTI]

to rapidly change the dielectric constant of a ferroelectric material under the application of a dc electric, by incorporating a ferrite material into a device, one gains the ability to change both the dielectric constant, a phase shifter will have changing characteris- tic impedance as it changes its phase. In this work, we em

291

NGNP PHASE I REVIEW  

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

REVIEW REVIEW NEAC REACTOR TECHNOLOGY SUBCOMMITTEE FINAL REPORT JUNE 15, 2011 EPACT 2005 REQUIREMENTS * FIRST PROJECT PHASE REVIEW-On a determination by the Secretary that the appropriate activities under the first project phase under subsection (b)(1) are nearly complete, the Secretary shall request the NERAC to conduct a comprehensive review of the Project and to report to the Secretary the recommendation of the NERAC concerning whether the Project is ready to proceed to the second project phase under subsection (b)(2) NGNP PROJECT PHASES (1) FIRST PHASE.-A first project phase shall be conducted to- (A) select and validate the appropriate technology under subsection (a)(1); (B) carry out enabling research, development, and demonstration activities on technologies and components under

292

An algorithm for faulted phase and feeder selection under high impedance fault conditions  

E-Print Network [OSTI]

substation. One-line diagram of a distribution system with two feeders. Typical high impedance fault, showing little or no change in phase voltage due to the fault. . Phase voltage and high frequency current component during a staged high impedance... substation. One-line diagram of a distribution system with two feeders. Typical high impedance fault, showing little or no change in phase voltage due to the fault. . Phase voltage and high frequency current component during a staged high impedance...

Benner, Carl Lee

2012-06-07T23:59:59.000Z

293

Climate change action plan  

E-Print Network [OSTI]

Delivery Climate change action plan 2009-2011 #12;2 | Climate change action plan ©istockphoto.com #12;Climate Change Action Plan Climate change action plan | 3 Contents Overview 4 Preface and Introduction 5 Climate change predictions for Scotland 6 The role of forestry 7 Protecting and managing

294

Holographic Magnetic Phase Transition  

E-Print Network [OSTI]

We study four-dimensional interacting fermions in a strong magnetic field, using the holographic Sakai-Sugimoto model of intersecting D4 and D8 branes in the deconfined, chiral-symmetric parallel phase. We find that as the magnetic field is varied, while staying in the parallel phase, the fermions exhibit a first-order phase transition in which their magnetization jumps discontinuously. Properties of this transition are consistent with a picture in which some of the fermions jump to the lowest Landau level. Similarities to known magnetic phase transitions are discussed.

Gilad Lifschytz; Matthew Lippert

2009-06-21T23:59:59.000Z

295

Degenerate Metric Phase Boundaries  

E-Print Network [OSTI]

The structure of boundaries between degenerate and nondegenerate solutions of Ashtekar's canonical reformulation of Einstein's equations is studied. Several examples are given of such "phase boundaries" in which the metric is degenerate on one side of a null hypersurface and non-degenerate on the other side. These include portions of flat space, Schwarzschild, and plane wave solutions joined to degenerate regions. In the last case, the wave collides with a planar phase boundary and continues on with the same curvature but degenerate triad, while the phase boundary continues in the opposite direction. We conjecture that degenerate phase boundaries are always null.

Ingemar Bengtsson; Ted Jacobson

1999-01-23T23:59:59.000Z

296

During Phase 3, WIPP  

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

UPDATE: April 14, 2014 Phase 3 activities begin Two teams re-entered the WIPP underground facility on Saturday, moving closer to suspected location of the February 14...

297

NGNP PHASE I REVIEW  

Energy Savers [EERE]

and start up operations of the prototype nuclear reactor and its associated hydrogen or electricity production facilities. Scope of Work for Review * Review Phase I reports in...

298

Bio-based production of the platform chemical 1,5-diaminopentane  

Science Journals Connector (OSTI)

In the rising era of bio-economy, the five carbon compound 1,5-diaminopentane receives increasing interest as platform chemical, especially as innovative building block for bio...Corynebacterium glutamicum or Esc...

Stefanie Kind; Christoph Wittmann

2011-09-01T23:59:59.000Z

299

Bio-based C-3 Platform Chemical: Biotechnological Production and -Conversion of 3-Hydroxypropionaldehyde.  

E-Print Network [OSTI]

??Demands for efficient, greener, economical and sustainable production of chemicals, materials and energy have led to development of industrial biotechnology as a key technology area… (more)

Rezaei, Roya

2013-01-01T23:59:59.000Z

300

Mainstreaming straw as a construction material : understanding the future of bio-based architectural materials  

E-Print Network [OSTI]

There is a current trend in design and construction towards the use of distinct prefabricated components in the production of buildings. There is also a growing awareness by architects and builders of the environmental ...

Carbone, Christopher M. (Christopher Martin), 1975-

2003-01-01T23:59:59.000Z

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


301

Production of bio-based materials using photobioreactors with binary cultures  

DOE Patents [OSTI]

A method, device and system for producing preselected products, (either finished products or preselected intermediary products) from biobased precursors or CO.sub.2 and/or bicarbonate. The principal features of the present invention include a method wherein a binary culture is incubated with a biobased precursor in a closed system to transform at least a portion of the biobased precursor to a preselected product. The present invention provides a method of cultivation that does not need sparging of a closed bioreactor to remove or add a gaseous byproduct or nutrient from a liquid medium. This improvement leads to significant savings in energy consumption and allows for the design of photobioreactors of any desired shape. The present invention also allows for the use of a variety of types of waste materials to be used as the organic starting material.

Beliaev, Alex S; Pinchuk, Grigoriy E; Hill, Eric A; Fredrickson, Jim K

2013-08-27T23:59:59.000Z

302

E-Print Network 3.0 - alternative bio-based fuels Sample Search...  

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

Chemicals and Fuels from Alternative Resources (ICFAR) atWestern's field station. The biogas facility... Bioindustrial Innovation Centre for research and development of...

303

Agricultural Producer Attitudes and Perceptions Towards New Bio-based Business Opportunities  

E-Print Network [OSTI]

in biomass activities and markets assuming it was viable relative to current farming activities. Results in the U.S. will require the use of bioenergy crops and agricultural residues (Walsh et al., 2003). In 2007

Wu, Qinglin

304

Building Bio-based Supply Chains: Theoretical Perspectives on Innovative Contract Design  

E-Print Network [OSTI]

and Futures Market to Support Bioenergy Development, IEEENo commodity markets currently exist for bioenergy crops.for bioenergy purposes. 61 Similarly, commodity market

Endres, Jody M.; Endres, A. Bryan; Stoller, Jeremy J.

2013-01-01T23:59:59.000Z

305

Oregon State University Development of a Bio-based Industry Utilizing Organic Waste Streams  

E-Print Network [OSTI]

of Idaho OVERVIEW Biologically-derived polyesters known as polyhydroxyalkanoates (PHAs) represent will be expanded to include a fermentation process to produce better PHA precursors rather than direct

Tullos, Desiree

306

Chemical Kinetic Simulation of the Combustion of Bio-based Fuels  

SciTech Connect (OSTI)

Due to environmental and economic issues, there has been an increased interest in the use of alternative fuels. However, before widespread use of biofuels is feasible, the compatibility of these fuels with specific engines needs to be examined. More accurate models of the chemical combustion of alternative fuels in Homogeneous Charge Compression Ignition (HCCI) engines are necessary, and this project evaluates the performance of emissions models and uses the information gathered to study the chemical kinetics involved. The computer simulations for each alternative fuel were executed using the Chemkin chemical kinetics program, and results from the runs were compared with data gathered from an actual engine that was run under similar conditions. A new heat transfer mechanism was added to the existing model's subroutine, and simulations were then conducted using the heat transfer mechanism. Results from the simulation proved to be accurate when compared with the data taken from the actual engine. The addition of heat transfer produced more realistic temperature and pressure data for biodiesel when biodiesel's combustion was simulated in an HCCI engine. The addition of the heat transfer mechanism essentially lowered the peak pressures and peak temperatures during combustion of all fuels simulated in this project.

Ashen, Ms. Refuyat [Oak Ridge High School; Cushman, Ms. Katherine C. [Oak Ridge High School

2007-10-01T23:59:59.000Z

307

Assessing the Economic Viability of Bio-based Products for Missouri Value-added Crop Production  

SciTech Connect (OSTI)

While research and development on biobased products has continued strong over the years, parallel attention on the economics and management of such product innovation has been lacking. With the financial support of the Department of Energy, the Economics and Management of Agrobiotechnology Center at the University of Missouri-Columbia has launched a pilot graduate education program that seeks to fill the gap. Within this context, a multi-disciplinary research and teaching program has been structured with an emphasis on new product and innovation economics and management. More specifically, this pilot graduate education program has the following major objectives: (1) To provide students with a strong background in innovation economics, management, and strategy. (2) To diversify the students academic background with coursework in science and technology. (3) To familiarize the student with biobased policy initiatives through interaction with state and national level organizations and policymakers. (4) To facilitate active collaboration with industry involved in the development and production of biobased products. The pilot education program seeks to develop human capital and research output. Although the research is, initially, focused on issues related to the State of Missouri, the results are expected to have national implications for the economy, producers, consumers and environment.

Nicholas Kalaitzandonakes

2005-11-30T23:59:59.000Z

308

From petrochemistry to biotech: a European perspective on the bio-based economy  

Science Journals Connector (OSTI)

...extracted from biomass or their derivatives...materials, and/or energy [1]. Its basic...plastic, this biomass was not only used for our energy production (in...problem is that energy producers start...opposite side of the biomass production chain...

2011-01-01T23:59:59.000Z

309

Building Bio-based Supply Chains: Theoretical Perspectives on Innovative Contract Design  

E-Print Network [OSTI]

supply chain for renewable energy production, this frameworkof biomass production for renewable energy products—mayenergy production, primarily for co- firing electricity generation facilities. 1 State renewable

Endres, Jody M.; Endres, A. Bryan; Stoller, Jeremy J.

2013-01-01T23:59:59.000Z

310

Building Bio-based Supply Chains: Theoretical Perspectives on Innovative Contract Design  

E-Print Network [OSTI]

of Energy and Environmental Law, University of Illinois,The Energy Farm at the University of Illinois at Urbana-Energy Generation: European Union Experience and Projections for Illinois,

Endres, Jody M.; Endres, A. Bryan; Stoller, Jeremy J.

2013-01-01T23:59:59.000Z

311

4 - Hydrogen production in conventional, bio-based and nuclear power plants  

Science Journals Connector (OSTI)

Abstract: A hydrogen economy advent cannot be based on the current processes and plants, but will need to take advantage of distributed generation systems and to exploit the potential of hydrogen generation in synergy with large electricity or heat generation plants, provided their CO2 emissions are intrinsically low or are abated by means of carbon capture and/or sequestration (CCS) systems. This chapter will focus on real carbon-based energy process appliances and new business cases. A section is also devoted to CCS technologies. Finally, the simultaneous production of hydrogen and power from nuclear plants will be reviewed from a technical point of view, and its future potential impact on the hydrogen economy will be evaluated.

D. Fino

2014-01-01T23:59:59.000Z

312

Rheokinetics of Ring-Opening Metathesis Polymerization of Bio-Based Castor Oil Thermoset  

Science Journals Connector (OSTI)

§ Ames Laboratory, US Department of Energy, Ames, Iowa 50011, United States ... ? Faculty of Science, Department of Chemistry, Cairo University, Orman-Giza 12613, Egypt ... However, concerns regarding petroleum depletion and the growing cost of oil, as well as the environmental impact of such materials, have led to an increased interest in alternative, sustainable, environmentally friendly materials based on renewable resources. ...

Samy A. Madbouly; Ying Xia; Michael R. Kessler

2012-09-24T23:59:59.000Z

313

Building Bio-based Supply Chains: Theoretical Perspectives on Innovative Contract Design  

E-Print Network [OSTI]

potatoes, other biomass; or natural gas produced from a biogas source, such as a landfill, sewage waste,

Endres, Jody M.; Endres, A. Bryan; Stoller, Jeremy J.

2013-01-01T23:59:59.000Z

314

Combined Grinding and Drying of Biomass in One Operation Phase I  

SciTech Connect (OSTI)

First American Scientific Corporation (FASC) has developed a unique and innovative grinder/dryer called KDS Micronex. The KS (Kinetic Disintegration System) combines two operations of grinding and drying into a single operation which reduces dependence on external heat input. The machine captures the heat of comminution and combines it will centrifugal forces to expedite moisture extraction from wet biomass. Because it uses mechanical forces rather than providing direct heat to perform the drying operation, it is a simpler machine and uses less energy than conventional grinding and drying operations which occur as two separate steps. The entire compact unit can be transported on a flatbed trailer to the site where biomass is available. Hence, the KDS Micronex is a technology that enables inexpensive pretreatment of waste materials and biomass. A well prepared biomass can be used as feed, fuel or fertilizer instead of being discarded. Electricity and chemical feedstock produced from such biomass would displace the use of fossil fuels and no net greenhouse gas emissions would result from such bio-based operations. Organic fertilizers resulting from the KS Micronex grinding/drying process will be pathogen-free unlike raw animal manures. The feasibility tests on KS during Phase I showed that a prototype machine can be developed, field tested and the technology demonstrated for commercial applications. The present KDS machine can remove up to 400 kg/h of water from a wet feed material. Since biomass processors demand a finished product that is only 10% moist and most raw materials like corn stover, bagasse, layer manure, cow dung, and waste wood have moisture contents of the order of 50%, this water removal rate translates to a production rate of roughly half a ton per hour. this is too small for most processors who are unwilling to acquire multiple machines because of the added complexity to the feed and product removal systems. The economics suffer due to small production rates, because the labor costs are a much larger fraction of the production cost. The goal for further research and development work is to scale up the KDS technology incorporating findings from Phase I into a machine that has superior performance characteristics.

Sokhansanj, S.

2008-06-26T23:59:59.000Z

315

On thermodynamically consistent schemes for phase field equations  

E-Print Network [OSTI]

and at the phase change front. A somewhat different approach of Charach and Zemel [2] combines bal- ance equationsOn thermodynamically consistent schemes for phase field equations C. Charach and P. C. Fife thermodynamics. The principal applications are to the solidification of a pure material and of a binary alloy

Fife, Paul

316

A Phase Odyssey  

SciTech Connect (OSTI)

We are introduced to the effects of phase from the earliest days of our childhood, from the nursery rhyme above (or its less verbose for 'Twinkle, Twinkle Little Star') to the shimmer over a hot road and the network of bright lines at the bottom of a swimming pool. These are all manifestations of phase. And there are many more.

Nugent, K.A.; Paganin, D.; Gureyev, T.E. (Melbourne)

2009-01-06T23:59:59.000Z

317

ARM - Climate Change  

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

FAQ Just for Fun Meet our Friends Cool Sites Teachers Teachers' Toolbox Lesson Plans Climate Change A Student's Guide to Global Climate Change The U.S. Environmental...

318

Climate change cripples forests  

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

Climate Change Cripples Forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality...

319

Climate change cripples forests  

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

Climate change cripples forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality...

320

ARM - Measurement - Hydrometeor phase  

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

phase phase ARM Data Discovery Browse Data Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Measurement : Hydrometeor phase Hydrometeor phase such as liquid ice or mixed phase Categories Cloud Properties Instruments The above measurement is considered scientifically relevant for the following instruments. Refer to the datastream (netcdf) file headers of each instrument for a list of all available measurements, including those recorded for diagnostic or quality assurance purposes. Value-Added Products VISST : Minnis Cloud Products Using Visst Algorithm (Process) VISSTPX04G08V2MINNIS : VISST-derived pixel-level products from satellite GOES8, version 2 VISSTPX04G08V3MINNIS : VISST-derived pixel-level products from satellite GOES8, version 3

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


321

Environmental Change Institute Environmental Change Institute  

E-Print Network [OSTI]

the functioning of forest ecosystems 16 Governing the world's tropical forests 18 Modelling new patterns of change Analysing water risks in a changing climate 34 A history of achievements Main cover photo: Wych Elm affecting it. We operate at global, national and local levels, working in partnership with people who can

Oxford, University of

322

Future projections of daily precipitation and its extremes in simulations of 21st century climate change.  

E-Print Network [OSTI]

??The current generation of climate models in the Coupled Model Intercomparison Project Phase 5 (CMIP5) is used to assess the future changes in daily precipitation… (more)

Yin, Lei

2013-01-01T23:59:59.000Z

323

Confined Self-Assembly of Block An-Chang Shi  

E-Print Network [OSTI]

Confined Self-Assembly of Block Copolymers An-Chang Shi Department of Physics & Astronomy Mc block copolymer self-assembly to produce and control nanostructures ·Phases and phase transitions, electric fields, confinements Self-Assembly of Block Copolymers #12;Confined Self-Assembly of Block

Maryland at College Park, University of

324

Overpotential-Dependent Phase Transformation Pathways  

SciTech Connect (OSTI)

An objective in battery development for higher storage energy density is the design of compounds that can accommodate maximum changes in ion concentration over useful electrochemical windows. Not surprisingly, many storage compounds undergo phase transitions in situ, including production of metastable phases. Unique to this environment is the frequent application of electrical over- and underpotentials, which are the electrical analogs to undercooling and superheating. Surprisingly, overpotential effects on phase stability and transformation mechanisms have not been studied in detail. Here we use synchrotron X-ray diffraction performed in situ during potentiostatic and galvanostatic cycling, combined with phase-field modeling, to reveal a remarkable dependence of phase transition pathway on overpotential in the model olivine Li{sub 1-x}FePO{sub 4}. For a sample of particle size {approx}113 nm, at both low (e.g., <20 mV) and high (>75 mV) overpotentials a crystal-to-crystal olivine transformation dominates, whereas at intermediate overpotentials a crystalline-to-amorphous phase transition is preferred. As particle sizes decrease to the nanoscale, amorphization is further emphasized. Implications for battery use and design are considered.

Y Kao; M Tang; N Meethong; J Bai; W Carter; Y Chiang

2011-12-31T23:59:59.000Z

325

Arch. Rational Mech. Anal. 142 (1998) 293329. c Springer-Verlag 1998 An Analysis of Phase-Field Alloys  

E-Print Network [OSTI]

are induced due to the change in phase and the change in material diffusion across the interface. Excess the modified Stefan model) in which a material in a spatial region Rd is in one of two phases, e.g., liquidArch. Rational Mech. Anal. 142 (1998) 293­329. c Springer-Verlag 1998 An Analysis of Phase

Ă?aginalp, Gunduz

326

Phasing tiny crystals  

Science Journals Connector (OSTI)

For tiny crystals, their diffraction intensities at and between the Bragg peaks become measurable due to the limited number of the unit cells, which can in principle be used to directly phase the crystal structures.

Miao, J.

2013-12-31T23:59:59.000Z

327

Sliding Luttinger liquid phases  

Science Journals Connector (OSTI)

We study systems of coupled spin-gapped and gapless Luttinger liquids. First, we establish the existence of a sliding Luttinger liquid phase for a system of weakly coupled parallel quantum wires, with and without disorder. It is shown that the coupling can stabilize a Luttinger liquid phase in the presence of disorder. We then extend our analysis to a system of crossed Luttinger liquids and establish the stability of a non-Fermi-liquid state: the crossed sliding Luttinger liquid phase. In this phase the system exhibits a finite-temperature, long-wavelength, isotropic electric conductivity that diverges as a power law in temperature T as T?0. This two-dimensional system has many properties of a true isotropic Luttinger liquid, though at zero temperature it becomes anisotropic. An extension of this model to a three-dimensional stack exhibits a much higher in-plane conductivity than the conductivity in a perpendicular direction.

Ranjan Mukhopadhyay; C. L. Kane; T. C. Lubensky

2001-07-09T23:59:59.000Z

328

Projected Changes in Temperature and Precipitation Extremes in China by the CMIP5 Multimodel Ensembles  

Science Journals Connector (OSTI)

This paper presents projected changes in temperature and precipitation extremes in China by the end of the twenty-first century based on the Coupled Model Intercomparison Project phase 5 (CMIP5) simulations. The temporal changes and their spatial ...

Botao Zhou; Qiuzi Han Wen; Ying Xu; Lianchun Song; Xuebin Zhang

2014-09-01T23:59:59.000Z

329

E-Print Network 3.0 - adiabatic temperature change Sample Search...  

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

adiabatic process changes the temperature of the gas without heating it. 12;DC A steam engine and a Ferrari... a phase change. Specific heat c of a substance is the energy...

330

A phase-space model for Pleistocene ice volume  

E-Print Network [OSTI]

We present a phase-space model that simulates Pleistocene ice volume changes based on Earth's orbital parameters. Terminations in the model are triggered by a combination of ice volume and orbital forcing and agree well with age estimates for Late Pleistocene terminations. The average phase at which model terminations begin is approximately 90 +/- 90 degrees before the maxima in all three orbital cycles. The large variability in phase is likely caused by interactions between the three cycles and ice volume. Unlike previous ice volume models, this model produces an orbitally driven increase in 100-kyr power during the mid-Pleistocene transition without any change in model parameters. This supports the hypothesis that Pleistocene variations in the 100-kyr power of glacial cycles could be caused, at least in part, by changes in Earth's orbital parameters, such as amplitude modulation of the 100-kyr eccentricity cycle, rather than changes within the climate system.

Imbrie, John Z; Lisiecki, Lorraine E

2011-01-01T23:59:59.000Z

331

Midwest Geological Sequestration Consortium--Validation Phase  

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

Geological Sequestration Geological Sequestration Consortium-Validation Phase Background The U.S. Department of Energy (DOE) has selected seven partnerships, through its Regional Carbon Sequestration Partnership (RCSP) initiative, to determine the best approaches for capturing and permanently storing carbon dioxide (CO 2 ), a greenhouse gas (GHG) which can contribute to global climate change. The RCSPs are made up of state and local agencies, coal companies, oil and gas companies, electric utilities,

332

Federal Energy Management Program: Continuous Change Institutional Change  

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

Continuous Change Continuous Change Institutional Change Principle to someone by E-mail Share Federal Energy Management Program: Continuous Change Institutional Change Principle on Facebook Tweet about Federal Energy Management Program: Continuous Change Institutional Change Principle on Twitter Bookmark Federal Energy Management Program: Continuous Change Institutional Change Principle on Google Bookmark Federal Energy Management Program: Continuous Change Institutional Change Principle on Delicious Rank Federal Energy Management Program: Continuous Change Institutional Change Principle on Digg Find More places to share Federal Energy Management Program: Continuous Change Institutional Change Principle on AddThis.com... Sustainable Buildings & Campuses Operations & Maintenance

333

Relative Phase States in Quantum-Atom Optics  

E-Print Network [OSTI]

Relative phase is treated as a physical quantity for two mode systems in quantum atom optics, adapting the Pegg-Barnett treatment of quantum optical phase to define a linear Hermitian relative phase operator via first introducing a complete orthonormal set of relative phase eigenstates. These states are contrasted with other so-called phase states. Other approaches to treating phase and previous attempts to find a Hermitian phase operator are discussed. The relative phase eigenstate has maximal two mode entanglement, it is a fragmented state with its Bloch vector lying inside the Bloch sphere and is highly spin squeezed. The relative phase states are applied to describing interferometry experiments with Bose-Einstein condensates (BEC), particularly in the context of a proposed Heisenberg limited interferometry experiment. For a relative phase eigenstate the fractional fluctuation in one spin operator component perpendicular to the Bloch vector is essentially only of order 1/N, so if such a highly spin squeezed state could be prepared it may be useful for Heisenberg limited interferometry. An approach for preparing a BEC in a state close to a relative phase state is suggested, based on adiabatically changing parameters in the Josephson Hamiltonian starting from a suitable energy eigenstate in the Rabi regime.

B J Dalton

2011-08-22T23:59:59.000Z

334

Environment and Climate Change  

E-Print Network [OSTI]

Migration, Environment and Climate Change: ASSESSING THE EVIDENCE #12;The opinions expressed;Migration, Environment and Climate Change: ASSESSING THE EVIDENCE Edited by Frank Laczko and Christine with with the financial support of #12;3 Migration, Environment and Climate Change: Assessing the Evidence Contents

Galles, David

335

Forest Research: Climate Change  

E-Print Network [OSTI]

Forest Research: Climate Change projects Forest Research is part of the Forestry Commission of climate change-related research is wide-ranging, covering impact assessment and monitoring, adaptation around a quarter of its research budget with Forest Research on climate change and related programmes

336

Climate Change Workshop 2007  

E-Print Network [OSTI]

1 Climate Change Workshop 2007 Adaptive Management and Resilience Relevant for the Platte River, UNL Climate Change Workshop 2007 · Resilience ·Why it matters · Adaptive Management ·How it helps ·Adaptive Capacity · What it is Overview Climate Change Workshop 2007 "A public Domain, once a velvet carpet

Nebraska-Lincoln, University of

337

programs in climate change  

E-Print Network [OSTI]

existing programs in climate change science and infrastructure. The Laboratory has a 15- year history in climate change science. The Climate, Ocean and Sea Ice Modeling (COSIM) project develops and maintains advanced numerical models of the ocean, sea ice, and ice sheets for use in global climate change

338

Campus Conversations: CLIMATE CHANGE  

E-Print Network [OSTI]

review and input from scholars with expertise in climate change and communication. #12; Welcome Thank youCampus Conversations: CLIMATE CHANGE AND THE CAMPUS Southwestern Pennsylvania Program booklet is an adaptation and updating of Global Warming and Climate Change, a brochure developed in 1994

Attari, Shahzeen Z.

339

Atomistic Modeling of Short Pulse Laser Ablation of Metals: Connections between Melting, Spallation, and Phase Explosion  

E-Print Network [OSTI]

, and Phase Explosion Leonid V. Zhigilei,* Zhibin Lin, and Dmitriy S. Ivanov§ Department of Materials Science spallation to phase explosion is signified by an abrupt change in the composition of the ejected plume (from of thermodynamic stability of the target material (90% of the critical temperature) into a two-phase mixture

Zhigilei, Leonid V.

340

Phase transitions and the stability of atomic and molecular ions Sabre Kaisa,  

E-Print Network [OSTI]

Phase transitions and the stability of atomic and molecular ions Sabre Kaisa, *, Juan Pablo is varied. For such transitions, crossing the phase boundary means that the quantum ground state changes Mass Spectrom 182/183 (1999) 23­29) © 1999 Elsevier Science B.V. Keywords: Phase transitions; Stability

Kais, Sabre

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


341

A Network Model for The Genesis and Migration of Gas Phase  

E-Print Network [OSTI]

1 A Network Model for The Genesis and Migration of Gas Phase Koukung Alex Chang and W. Brent, of a compositional fluid consisting of water with a dissolved hydrocarbon gas. The model captures both single phase 99% of the (effectively) stored CO2 resides in the liquid phase. Key Words: network model, gas

New York at Stoney Brook, State University of

342

Active doublet method for measuring small changes in physical properties  

DOE Patents [OSTI]

Small changes in material properties of a work piece are detected by measuring small changes in elastic wave velocity and attenuation within a work piece. Active, repeatable source generate coda wave responses from a work piece, where the coda wave responses are temporally displaced. By analyzing progressive relative phase and amplitude changes between the coda wave responses as a function of elapsed time, accurate determinations of velocity and attenuation changes are made. Thus, a small change in velocity occurring within a sample region during the time periods between excitation origin times (herein called "doublets") will produce a relative delay that changes with elapsed time over some portion of the scattered waves. This trend of changing delay is easier to detect than an isolated delay based on a single arrival and provides a direct measure of elastic wave velocity changes arising from changed material properties of the work piece.

Roberts, Peter M. (Los Alamos, NM); Fehler, Michael C. (Los Alamos, NM); Johnson, Paul A. (Santa Fe, NM); Phillips, W. Scott (Santa Fe, NM)

1994-01-01T23:59:59.000Z

343

ULO Course Learning Outcome Assessment Method Pedagogy 08-Explain how an external change to a  

E-Print Network [OSTI]

as the addition of a solute to a material, or a phase change) affects the structure, proper- ties, processing and to a material (such as a change in tempera- ture, or an applied stress), and/or an internal change (suchENGR245 ULO Course Learning Outcome Assessment Method Pedagogy 08- Explain how an external change

Barrash, Warren

344

Viscosity near phase transitions  

E-Print Network [OSTI]

Probably the most enticing observation in theoretical physics during the last decade was the discovery of the great amount of consequences obtained from the AdS/CFT conjecture put forward by Maldacena. In this work we review how this correspondence can be used to address hydrodynamic properties such as the viscosity of some strongly interacting systems. We also employ the Boltzmann equation for those systems closer to low-energy QCD, and argue that this kind of transport coefficients can be related to phase transitions, in particular the QGP/hadronic phase transition studied in heavy ion collisions.

Antonio Dobado; Felipe J. Llanes-Estrada; Juan M. Torres-Rincon

2010-09-30T23:59:59.000Z

345

Linear phase compressive filter  

DOE Patents [OSTI]

A phase linear filter for soliton suppression is in the form of a laddered series of stages of non-commensurate low pass filters with each low pass filter having a series coupled inductance (L) and a reverse biased, voltage dependent varactor diode, to ground which acts as a variable capacitance (C). L and C values are set to levels which correspond to a linear or conventional phase linear filter. Inductance is mapped directly from that of an equivalent nonlinear transmission line and capacitance is mapped from the linear case using a large signal equivalent of a nonlinear transmission line.

McEwan, Thomas E. (Livermore, CA)

1995-01-01T23:59:59.000Z

346

Berry Phase Quantum Thermometer  

E-Print Network [OSTI]

We show how Berry phase can be used to construct an ultra-high precision quantum thermometer. An important advantage of our scheme is that there is no need for the thermometer to acquire thermal equilibrium with the sample. This reduces measurement times and avoids precision limitations.

Martin-Martinez, E; Mann, R B; Fuentes, I

2011-01-01T23:59:59.000Z

347

Berry Phase Quantum Thermometer  

E-Print Network [OSTI]

We show how Berry phase can be used to construct an ultra-high precision quantum thermometer. An important advantage of our scheme is that there is no need for the thermometer to acquire thermal equilibrium with the sample. This reduces measurement times and avoids precision limitations.

E. Martin-Martinez; A. Dragan; R. B. Mann; I. Fuentes

2013-05-28T23:59:59.000Z

348

Phase II Final Report  

SciTech Connect (OSTI)

The SkyTrough DSP will advance the state-of-the-art in parabolic troughs for utility applications, with a larger aperture, higher operating temperature, and lower cost. The goal of this project was to develop a parabolic trough collector that enables solar electricity generation in the 2020 marketplace for a 216MWe nameplate baseload power plant. This plant requires an LCOE of 9˘/kWhe, given a capacity factor of 75%, a fossil fuel limit of 15%, a fossil fuel cost of $6.75/MMBtu, $25.00/kWht thermal storage cost, and a domestic installation corresponding to Daggett, CA. The result of our optimization was a trough design of larger aperture and operating temperature than has been fielded in large, utility scale parabolic trough applications: 7.6m width x 150m SCA length (1,118m2 aperture), with four 90mm diameter × 4.7m receivers per mirror module and an operating temperature of 500°C. The results from physical modeling in the System Advisory Model indicate that, for a capacity factor of 75%: The LCOE will be 8.87˘/kWhe. SkyFuel examined the design of almost every parabolic trough component from a perspective of load and performance at aperture areas from 500 to 2,900m2. Aperture-dependent design was combined with fixed quotations for similar parts from the commercialized SkyTrough product, and established an installed cost of $130/m2 in 2020. This project was conducted in two phases. Phase I was a preliminary design, culminating in an optimum trough size and further improvement of an advanced polymeric reflective material. This phase was completed in October of 2011. Phase II has been the detailed engineering design and component testing, which culminated in the fabrication and testing of a single mirror module. Phase II is complete, and this document presents a summary of the comprehensive work.

Schuknecht, Nate [Project Manager; White, David [Principle Investigator; Hoste, Graeme [Research Engineer

2014-09-11T23:59:59.000Z

349

Magnetic properties changes of MnAs thin films irradiated with highly charged ions  

E-Print Network [OSTI]

transition from hexagonal ( phase) to orthorhombic ( phase, MnP type) is accompanied by a ferromagnetic transition that leads to the - phase coexistence over a large range of temperatures (10­45 C [9Magnetic properties changes of MnAs thin films irradiated with highly charged ions M. Trassinellia

350

Digital Measures screen changes 1 Digital Measures screen changes 2  

E-Print Network [OSTI]

Digital Measures screen changes 1 #12; Digital Measures screen changes 2 #12; Digital Measures screen changes 3 #12; Digital Measures screen changes 4 #12; Digital Measures screen changes 5 #12; Digital Measures screen changes 6 #12; Digital Measures screen changes 7 #12

Barrash, Warren

351

Oversight and Change  

National Nuclear Security Administration (NNSA)

the Baseline Change Proposal process. Two 400,000-gallon fire protection water supply tanks and associated pumping facilities were added. Later in the project, an additional...

352

Change Control Management Guide  

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

The Guide provides a suggested approach and uniform guidance for managing project and contract changes through applying the requirements of DOE O 413.3B. No cancellation.

2011-07-29T23:59:59.000Z

353

Corporate Climate Change Adaptation.  

E-Print Network [OSTI]

?? On-going and future climate change is universally acknowledged. Climate changeincorporating global mean temperature rise, impacts on global hydrology and ecosystems willaffect human society and… (more)

Herbertsson, Nicole

2010-01-01T23:59:59.000Z

354

Climate Change, Drought & Environment  

Broader source: Energy.gov [DOE]

Afternoon Plenary Session: Current Trends in the Advanced Bioindustry Climate Change, Drought, and Environment—Michael Champ, Executive Director, The Sustainable Water Challenge

355

Leadership Institutional Change Principle  

Broader source: Energy.gov [DOE]

For changing behavior among employees, leaders in Federal agencies should visibly communicate their own commitments to sustainability in the workplace. Such visible leadership will help achieve...

356

Commitment Institutional Change Principle  

Broader source: Energy.gov [DOE]

Commitment can be a crucial element that helps Federal agencies inject and emphasize sustainability in their organizational culture. Institutions and people change when they have made definite...

357

THE WEEK'S PRICE CHANGES  

Science Journals Connector (OSTI)

THE WEEK'S PRICE CHANGES ... Socony Vacuum Oil Co. effected a second reduction in its prices for No. 2 fuel oil and ... ...

1950-02-27T23:59:59.000Z

358

CONFIGURATION CHANGE PROPOSAL FORM  

Broader source: Energy.gov [DOE]

This form is used for sharing information on Domain Name Server (DNS) changes, new requirements, modifications or enhancements within the DOE Headquarters Programmatic and Office Management Areas.

359

Plains CO2 Reduction Partnership--Development Phase  

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

Development Phase Development Phase Background As part of a comprehensive effort to assess options for sustainable energy systems, the U.S. Department of Energy has selected seven regional partnerships, through its Regional Carbon Sequestration Partnership (RCSP) initiative, to determine the best approaches for capturing and permanently storing carbon dioxide (CO 2 ), a greenhouse gas (GHG) which can contribute to global climate change. The partnerships are

360

Plains CO2 Reduction Partnership--Validation Phase  

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

Validation Phase Validation Phase Background The U.S. Department of Energy (DOE) has selected seven partnerships, through its Regional Carbon Sequestration Partnership (RCSP) initiative, to determine the best approaches for capturing and permanently storing carbon dioxide (CO 2 ), a greenhouse gas (GHG) which can contribute to global climate change. The RCSPs are made up of state and local agencies, coal companies, oil and gas companies, electric utilities,

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


361

Nonextensive effects on the phase structure of QHD  

E-Print Network [OSTI]

We investigate nonextensive effects on phase transition in nuclear matter in the context Walecka many-body field theory. Changes in the general behavior are observed when the results calculated for the nuclear matter at vanishing baryon density are compared to those obtained through the standard Fermi-Dirac distribution. It is observed a dependence between the nonextensive parameter $q$ and the coupling constants $C_S^2$ of the phase transition. A numerical relation for this thermodynamical dependence is also proposed.

F. I. M. Pereira; R. Silva; J. S. Alcaniz

2009-06-12T23:59:59.000Z

362

"Managing Department Climate Change"  

E-Print Network [OSTI]

"Managing Department Climate Change" #12;Presenters · Ronda Callister Professor, Department Department Climate? · Assesment is essential for determining strategies for initiating change · In a research climate · Each panelist will describe an intervention designed to improve department climate ­ Ronda

Sheridan, Jennifer

363

General Indicators: Change from  

E-Print Network [OSTI]

in 1 business day 82% -11% 100% 100% 100% 100% 78% Quality Inspections Completed 100% No Change 95% - - 100% Non-FLS 81% No Change 70% Key: See Definitions Document for descriptions of performance measures: All Districts Combined District Breakdown Steam/Chilled Water Electric 77% 92% 0 2 100% - Met Target

Webb, Peter

364

General Indicators: Change from  

E-Print Network [OSTI]

% 100% 100% 67% 98% Quality Inspections Completed 100% No Change 95% 100% 100% 100% 100% Utilities Definitions Document for descriptions of performance measures and specific color code target values. Trend District Breakdown Steam/Chilled Water - 76% 92% - Improvement No Change Met Target Requires Review

Webb, Peter

365

General Indicators: Change from  

E-Print Network [OSTI]

's): Quantity 10 No Change 100 1 1 3 5 Completed in 1 business day 70% -10% 100% 100% 0% 100% 60% Quality measures and specific color code target values. Trend status color indicators ­ identifies changes from the prior month: Steam/Chilled Water Electric 84% 84% 4 3 - - Met Target Requires ReviewMissed Target

Webb, Peter

366

Indicators: Change from  

E-Print Network [OSTI]

% Quality Inspections Completed 99% No Change 95% 100% 100% 99% 100% Utilities: Performance Statistics of performance measures and specific color code target values. Trend status color indicators ­ identifies changes SCORECARD All Districts Combined District Breakdown Steam/Chilled Water June 2008 All Districts Combined All

Webb, Peter

367

NETL: Carbon Storage - Regional Partnership Validation Phase (Phase II)  

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

Validation Phase (Phase II) Projects Validation Phase (Phase II) Projects The Regional Carbon Sequestration Partnerships' (RCSP) Validation Phase focuses on validating the most promising regional opportunities to deploy CCS technologies by building upon the accomplishments of the Characterization Phase. Two different CO2 storage approaches are being pursued in this phase: geologic and terrestrial carbon storage. The Validation Phase includes 20 geologic and 11 terrestrial CO2 storage projects. Efforts are being conducted to: Validate and refine current reservoir simulations for CO2 storage projects. Collect physical data to confirm CO2 storage potential and injectivity estimates. Demonstrate the effectiveness of monitoring, verification, and accounting (MVA) technologies. Develop guidelines for well completion, operations, and abandonment.

368

Propeller pitch change mechanism  

SciTech Connect (OSTI)

This patent describes an aircraft propulsion system. It comprises: a first turbine carrying a first set of propeller blades; a second turbine carrying a second set of propeller blades; a gear system carried by the first turbine for changing pitch of the first set of propeller blades, which includes a pair of ring gears, both coaxial with the first turbine; a first set of planet gears which engage both ring gears and which induce pitch change when the planet gears rotate; a sun gear which drives the planet gears; a second set of planet gears which are carried by a planet gear carrier affixed to the second turbine and which drive the sun gear in order to change pitch by causing relative motion between the sung ear and the first turbine; and means for preventing a change in speed of the planet gear carrier from causing a change in pitch.

Hora, P.

1992-10-13T23:59:59.000Z

369

Climate change risk and response  

E-Print Network [OSTI]

and Kate Scow. 2006. “Climate Change: Page 117 ChallengesLandscapes. ” California Climate Change Center White Paper.Sea Level. ” California Climate Change Center White Paper.

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

370

Review: Preparing for Climate Change  

E-Print Network [OSTI]

Review: Preparing for Climate Change By Michael D.Stephen, Preparing for Climate Change. A Boston Review Book.alkaline paper. “Climate change is inevitable, but disaster

Kunnas, Jan

2013-01-01T23:59:59.000Z

371

Climate Change and National Security  

E-Print Network [OSTI]

CLIMATE CHANGE Multiplying Threats to National Securityfor the impacts of climate change on national security. Pagea warming world. Page 11 “Climate change acts as a threat

Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

2015-01-01T23:59:59.000Z

372

Intercomparison of the Cloud Water Phase among Global Climate Models  

SciTech Connect (OSTI)

Mixed-phase clouds (clouds that consist of both cloud droplets and ice crystals) are frequently present in the Earth’s atmosphere and influence the Earth’s energy budget through their radiative properties, which are highly dependent on the cloud water phase. In this study, the phase partitioning of cloud water is compared among six global climate models (GCMs) and with Cloud and Aerosol Lidar with Orthogonal Polarization retrievals. It is found that the GCMs predict vastly different distributions of cloud phase for a given temperature, and none of them are capable of reproducing the spatial distribution or magnitude of the observed phase partitioning. While some GCMs produced liquid water paths comparable to satellite observations, they all failed to preserve sufficient liquid water at mixed-phase cloud temperatures. Our results suggest that validating GCMs using only the vertically integrated water contents could lead to amplified differences in cloud radiative feedback. The sensitivity of the simulated cloud phase in GCMs to the choice of heterogeneous ice nucleation parameterization is also investigated. The response to a change in ice nucleation is quite different for each GCM, and the implementation of the same ice nucleation parameterization in all models does not reduce the spread in simulated phase among GCMs. The results suggest that processes subsequent to ice nucleation are at least as important in determining phase and should be the focus of future studies aimed at understanding and reducing differences among the models.

Komurcu, Muge; Storelvmo, Trude; Tan, Ivy; Lohmann, U.; Yun, Yuxing; Penner, Joyce E.; Wang, Yong; Liu, Xiaohong; Takemura, T.

2014-03-27T23:59:59.000Z

373

The Quantum Nature of a Nuclear Phase Transition  

E-Print Network [OSTI]

In their ground states, atomic nuclei are quantum Fermi liquids. At finite temperatures and low densities, these nuclei may undergo a phase change similar to, but substantially different from, a classical liquid gas phase transition. As in the classical case, temperature is the control parameter while density and pressure are the conjugate variables. At variance with the classical case, in the nucleus the difference between the proton and neutron concentrations acts as an additional order parameter, for which the symmetry potential is the conjugate variable. Different ratios of the neutron to proton concentrations lead to different critical points for the phase transition. This is analogous to the phase transitions occurring in $^{4}$He-$^{3}$He liquid mixtures. We present experimental results which reveal the N/Z dependence of the phase transition and discuss possible implications of these observations in terms of the Landau Free Energy description of critical phenomena.

A. Bonasera; Z. Chen; R. Wada; K. Hagel; J. Natowitz; P. Sahu; L. Qin; S. Kowalski; Th. Keutgen; T. Materna; T. Nakagawa

2008-03-26T23:59:59.000Z

374

Pure Phase Solubility Limits: LANL  

SciTech Connect (OSTI)

The natural and engineered system at Yucca Mountain (YM) defines the site-specific conditions under which one must determine to what extent the engineered and the natural geochemical barriers will prevent the release of radioactive material from the repository. Most important mechanisms for retention or enhancement of radionuclide transport include precipitation or co-precipitation of radionuclide-bearing solid phases (solubility limits), complexation in solution, sorption onto surfaces, colloid formation, and diffusion. There may be many scenarios that could affect the near-field environment, creating chemical conditions more aggressive than the conditions presented by the unperturbed system (such as pH changes beyond the range of 6 to 9 or significant changes in the ionic strength of infiltrated waters). For an extended period of time, the near-field water composition may be quite different and more extreme in pH, ionic strength, and CO{sub 2} partial pressure (or carbonate concentration) than waters at some distance from the repository. Reducing conditions, high pH (up to 11), and low carbonate concentration may be present in the near-field after reaction of infiltrating groundwater with engineered barrier systems, such as cementitious materials. In the far-field, conditions are controlled by the rock-mass buffer providing a near-neutral, oxidizing, low-ionic-strength environment that controls radionuclide solubility limits and sorption capacities. There is the need for characterization of variable chemical conditions that affect solubility, speciation, and sorption reactions. Modeling of the groundwater chemistry is required and leads to an understanding of solubility and speciation of the important radionuclides. Because experimental studies cannot be performed under the numerous potential chemical conditions, solubility limitations must rely on geochemical modeling of the radionuclide's chemistry. Fundamental thermodynamic properties, such as solubility products, complex stability constants, and redox potentials for radionuclides in different oxidation states, form the underlying database to be used for those calculations. The potentially low solubilities of many radionuclides in natural waters constitute the first barrier for their migration from the repository into the environment. Evaluation of this effect requires a knowledge of the site-specific water chemistry and the expected spatial and temporal ranges of its variability. Quantitative determinations of radionuclide solubility in waters within the range of chemistry must be made. Speciation and molecular complexation must be ascertained to interpret and apply solubility results. The solubilities thus determined can be used to assess the effectiveness of solubility in limiting radionuclide migration. These solubilities can also be used to evaluate the effectiveness of other retardation processes expected to occur once dissolution of the source material and migration begin. Understanding the solubility behavior of radionuclides will assist in designing valuable sorption experiments that must be conducted below the solubility limit since only soluble species participate in surface reactions and sorption processes. The present strategy for radionuclide solubility tasks has been to provide a solubility model from bulk-experiments that attempt to bracket the estimate made for this Analysis and Modeling Report (AMR) of water conditions on site. The long-term goal must be to develop a thermodynamic database for solution speciation and solid-state determination as a prerequisite for transport calculations and interpretation of empirical solubility data. The model has to be self-consistent and tested against known solubility studies in order to predict radionuclide solubilities over the continuous distribution ranges of potential water compositions for performance assessment of the site. Solubility studies upper limits for radionuclide concentrations in natural waters. The concentration in the aqueous phase is controlled by the radionuclide-bearing solid phase and by

C. Stockman

2001-01-26T23:59:59.000Z

375

GEA Development Phases | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » GEA Development Phases Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home GEA Development Phases The information for this page was taken directly from Geothermal Reporting Terms and Definitions: A Guide to Reporting Resource Development Progress and Results to the Geothermal Energy Association (GEA, November 2010) Gea.jpg The Geothermal Energy Association's (GEA) Geothermal Reporting Terms and Definitions are a guideline for geothermal developers to use when submitting geothermal resource development information to GEA for public dissemination in its annual US Geothermal Power Production and Development

376

Structure and composition of phases occurring in austenitic stainless steels in thermal and irradiation environments  

SciTech Connect (OSTI)

Transmission electron diffraction techniques coupled with quantitative x-ray energy dispersive spectroscopy have been used to characterize the phases which develop in austenitic stainless steels during exposure to thermal and to irradiation environments. In AISI 316 and Ti-modified stainless steels some thirteen phases have been identified and characterized in terms of their crystal structure and chemical composition. Irradiation does not produce any completely new phases. However, as a result of radiation-induced segregation principally of Ni and Si, and of enhanced diffusion rates, several major changes in phase relationships occur during irradiation. Firstly, phases characteristic of remote regions of the phase diagram appear unexpectedly and dissolve during postirradiation annealing (radiation-induced phases). Secondly, some phases develop with their compositions significantly altered by the incorporation of Ni or Si (radiation-modified phases).

Lee, E.H.; Maziasz, P.J.; Rowcliffe, A.F.

1980-01-01T23:59:59.000Z

377

Microcellular foams via phase separation  

SciTech Connect (OSTI)

A study of wide variety of processes for making plastic foams shows that phase separation processes for polymers from solutions offers the most viable methods for obtaining rigid plastic foams which met the physical requirements for fusion target designs. Four general phase separation methods have been shown to give polymer foams with densities less than 0.1 g/cm/sup 3/ and cell sizes of 30..mu..m or less. These methods involve the utilization of non-solvent, chemical or thermal cooling processes to achieve a controlled phase separation wherein either two distinct phases are obtained where the polymer phase is a continuous phase or two bicontinuous phases are obtained where both the polymer and solvent are interpenetrating, continuous, labyrinthine phases. Subsequent removal of the solvent gives the final foam structure.

Young, A.T.

1985-01-01T23:59:59.000Z

378

Independently variable phase and stroke control for a double acting Stirling engine  

SciTech Connect (OSTI)

A phase and stroke control apparatus for the pistons of a Stirling engine includes a ring on the end of each piston rod in which a pair of eccentrics is arranged in series, torque transmitting relationship. The outer eccentric is rotatably mounted in the ring and is rotated by the orbiting ring; the inner eccentric is mounted on an output shaft. The two eccentrics are mounted for rotation together within the ring during normal operation. A device is provided for rotating one eccentric with respect to another to change the effective eccentricity of the pair of eccentrics. A separately controlled phase adjustment is provided to null the phase change introduced by the change in the orientation of the outer eccentric, and also to enable the phase of the pistons to be changed independently of the stroke change.

Berchowitz, David M. (Scotia, NY)

1983-01-01T23:59:59.000Z

379

Phase 1 -- 2  

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

2 2 Revised 8/7/02 " "Sample Statement of Work - Standard Service Offerings for Contractor-Identified Project" "Task #","Task Title","Work Scope","Deliverable","Agency Requirements" " " "Phase Two - Initial Project Development" "2-1","DO RFP Development - Direct Support","Based upon interviews Agency/site staff and consultation support, FEMP Services will prepare DO RFP for Agency/site. FEMP Services will provide onsite or telecon review of draft DO RFP with agency staff. FEMP Services will prepare 2nd draft DO RFP based on telecon and written agency review comments and recommendations. ","Draft DO RFP Document. On-site review of draft DO RFP.

380

Neutron phase echo  

Science Journals Connector (OSTI)

The coherent overlap of the waves traversing the two legs of a perfect-crystal neutron interferometer is altered by a material with a neutron-nuclear optical potential. The fringe visibility is limited by the longitudinal coherence length. The loss of interference contrast caused by a slab of material of positive optical potential can be restored by placing another slab of material with a negative optical potential in the same leg of the interferometer. This paper describes the observation and detailed characterization of this quantum-mechanical phenomenon, which we call the phase-echo effect.

R. Clothier; H. Kaiser; S. A. Werner; H. Rauch; H. Wölwitsch

1991-11-01T23:59:59.000Z

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


381

Phase 1 --2  

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

2 2 Rev 4-01-05 " "Statement of Work - Standard Service Offerings for Contractor-Identified Project at (insert project site)" "Task #","Task Title","Work Scope","Deliverable","Agency Requirements" " " "Phase Two - Initial Project Development" "2-1","DO RFP Development - Direct Support","Based upon interviews Agency/site staff and consultation support, FEMP Services will prepare DO RFP for Agency/site. FEMP Services will provide onsite or telecon review of draft DO RFP with agency staff. FEMP Services will prepare 2nd draft DO RFP based on telecon and written agency review comments and recommendations. ","Draft DO RFP Document. On-site review of draft DO RFP.

382

Property:Project Phase | Open Energy Information  

Open Energy Info (EERE)

Phase Phase Jump to: navigation, search Property Name Project Phase Property Type Text This is a property of type String. Pages using the property "Project Phase" Showing 25 pages using this property. (previous 25) (next 25) M MHK Projects/40MW Lewis project + Phase 2 + MHK Projects/ADM 3 + Phase ? + MHK Projects/ADM 4 + Phase ? + MHK Projects/ADM 5 + Phase 2 + MHK Projects/AW Energy EMEC + Phase 3 + MHK Projects/AWS II + Phase 1 + MHK Projects/Admirality Inlet Tidal Energy Project + Phase 1 + MHK Projects/Agucadoura + Phase 3 + MHK Projects/Alaska 1 + Phase 0 + MHK Projects/Alaska 13 + Phase ? + MHK Projects/Alaska 17 + Phase 0 + MHK Projects/Alaska 18 + Phase 0 + MHK Projects/Alaska 24 + Phase 0 + MHK Projects/Alaska 25 + Phase 0 + MHK Projects/Alaska 28 + Phase 0 +

383

Climate change cripples forests  

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

Climate change cripples forests Climate change cripples forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality will cause forest and species distributions to change substantially. October 1, 2012 A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "There will still be wet winters, but they will more often be followed by warm summers, putting stress on trees and limiting their ability to respond

384

Climate change cripples forests  

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

Climate Change Cripples Forests Climate Change Cripples Forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality will cause forest and species distributions to change substantially. October 1, 2012 A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "There will still be wet winters, but they will more often be followed by warm summers, putting stress on trees and limiting their ability to respond

385

Climate change cripples forests  

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

Climate Change Cripples Forests Climate Change Cripples Forests Climate change cripples forests A team of scientists concluded that in the warmer and drier Southwest of the near future, widespread tree mortality will cause forest and species distributions to change substantially. October 1, 2012 A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. A dead pinon at the edge of the Grand Canyon, harbinger of the future for trees in the Southwest United States. Photo courtesy A. Park Williams. Contact Nancy Ambrosiano Communications Office (505) 667-0471 Email "There will still be wet winters, but they will more often be followed by warm summers, putting stress on trees and limiting their ability to respond

386

Configuration Change Management  

E-Print Network [OSTI]

shown that if a company does not continue to innovate, whether it is products or services, it will not be able to remain successful. This philosophy is extremely important with design engineering companies. If managed correctly, change can be a...

Yoder, Nathaniel

2012-05-11T23:59:59.000Z

387

sentinels of climate change  

Science Journals Connector (OSTI)

precipitation, and solar radiation at timescales ranging from a single storm event to seasonal changes to longer- ..... New Mexico to seepage and surface runoff lakes of glacial ...... strain planktonic energy transfer efficiency across multiple.

2014-03-27T23:59:59.000Z

388

How Europe is Changing  

E-Print Network [OSTI]

Doves Fly Away The Nuclear Power Plant Auschwitz The BlogsEurope is Changing The Nuclear Power Plant What should I doof Iranians to have a nuclear power plant if they so choose,

Abdolah, Kader

2012-01-01T23:59:59.000Z

389

chang-98.pdf  

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

from Models and Collocated AVHRR and ERBE Satellite Observations F.-L. Chang and Z. Li Canada Centre for Remote Sensing Ottawa, Ontario, Canada S. A. Ackerman Department of...

390

Climate Change Proposed Scoping Plan  

E-Print Network [OSTI]

Climate Change Proposed Scoping Plan a amework for change Prepared by the California Air ResourcesBackgroundBackgroundBackground ............................................................................................................................................................................................................................................................................................................................................................................................................ 4444 1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California1. Climate Change Policy in California

391

Phase 1 -- 4  

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

4" 4" "Statement of Work - Optional Service Offerings for Contractor-Identified Project" "Task #","Task Title","Work Scope","Deliverable","Agency Requirements" " " "Phase Two - Initial Project Development" "Replace Std Task# 2-1","DO RFP Development - On Site Consultation","FEMP Services will provide technical consultation resources at the Agency's site to assist in the integration of the site's requirements into the DO RFP template.","Oral Comments","Agency staff will draft DO RFP. Provide copies to FEMP Services staff for review." "Phase Three - Negotiations and Award" "Replace Std Task# 3-4","Final Proposal Review - Direct Support","FEMP Services will provide direct technical resources to review final proposal. Review will include assessment of ESPC-unique data such as markups, performance period expenses, and financing interest rates. FEMP Services will assure that price schedules have been filled out correctly. ESCO specified equipment will be evaluated for its appropriateness and installation expense (labor and material). FEMP Services will coordinate and assemble agency and FEMP Services questions and issues for Agency CO to be presented to ESCO for discussions and negotiations. ","Telecon Advice and Written comments and recommendations","Agency will provide FEMP Services staff copies of final proposal with emphasis on selected equipment compatibility with agency performance requirements. Agency shall ensure applicable acquisition team members review final proposal. Agency will generate site questions or issues prior to scheduled telecons with FEMP Services staff. Agency will review questions and issues for ESCO discussions. Agency CO will submit questions and issues to ESCO."

392

3 - Thermodynamics and Phase Diagrams  

Science Journals Connector (OSTI)

Abstract Many types of phase diagram sections involving temperature, composition, pressure, chemical potentials, partial pressures, volume and enthalpy as axis variables or constants are described for binary, ternary and multicomponent systems. The theme is the relationship between thermodynamics and phase diagrams. A review of the fundamentals of thermodynamics as required for the interpretation and calculation of phase diagrams is presented. One set of general geometrical rules which governs all types of single-valued phase diagram sections is derived. The computer calculation of phase diagrams from large critically assessed databases of model parameters is discussed.

Arthur D. Pelton

2014-01-01T23:59:59.000Z

393

Changes in the Distribution of Rain Frequency and Intensity in Response to Global Warming  

Science Journals Connector (OSTI)

Changes in the frequency and intensity of rainfall are an important potential impact of climate change. Two modes of change, a shift and an increase, are applied to simulations of global warming with models from phase 5 of the Coupled Model ...

Angeline G. Pendergrass; Dennis L. Hartmann

2014-11-01T23:59:59.000Z

394

Phase equilibrium studies  

SciTech Connect (OSTI)

A phase equilibrium model has been developed for the SRC-I process, as well as the other coal liquefaction processes. It is applicable to both vapor/liquid and liquid/liquid equilibria; it also provides an approximate but adequate description of aqueous mixtures where the volatile electrolyte components dissociate to form ionic species. This report completes the description of the model presented in an earlier report (Mathias and Stein, 1983a). Comparisons of the model to previously published data on coal-fluid mixtures are presented. Further, a preliminary analysis of new data on SRC-I coal fluids is presented. Finally, the current capabilities and deficiencies of the model are discussed. 25 references, 17 figures, 30 tables.

Mathias, P.M.; Stein, F.P.

1983-09-01T23:59:59.000Z

395

Commensurate phases, incommensurate phases and the devil’s staircase  

E-Print Network [OSTI]

Modulated structures with periods which are incommensurable (or high-order com-mensurable) with the basic lattice are quite common in condensed-matter physics. The structure may be another lattice, a periodic lattice distortion, a helical or sinusoidal magnetic structure, or a charge density wave in one, two or three dimensions. This review surveys recent theories on the transition between commensurate (C) and incommensurate (I) phases, and on the properties of the ‘incommensurate ’ phase. The predictions of theories will be compared with experiments. The CI transition is usually described in terms of wall, or soliton, formation. The nature of the transition and the structure of the I phase are quite different in two and three dimensions. In three dimensions the I phase seems to consist of an infinity of high-order locked C phases, which may or may not be separated by an infinity of truly incommensurate phases. This behaviour is known as the ‘devil’s staircase’. In two dimensions the incommensurate phase (at T # 0) is a ‘floating ’ phase without complete long-range order, and it does not ‘lock-in ’ at high-order commensurate phases. Phase diagrams are determined by the stability of two types of ‘topological ’ defects: walls, which destabilise the C phase with respect to I phases, and dislocations or vortices which generate paramagnetic or fluid phases. A consequence of this competition is that for sufficiently low order of commensurability the C and I phases are separated by a fluid phase. The properties of modulated systems can be studied by iterating certain area-preserving two-dimensional maps. Very recent studies indicate that, in addition to C and I phases, there are chaotic structures which are at least metastable. The chaotic regimes separate C and I phases and may be described as randomly pinned solitons. The relevance of the chaotic regimes to adsorbed monolayers, pinning of charge density waves, Peierls transitions and spin glasses is briefly discussed. This review was received in July 1981.

Per Bak

396

Climate Change Review of Muller's chapter on Climate Change from  

E-Print Network [OSTI]

Climate Change · Review of Muller's chapter on Climate Change from Physics for Future Society) controversy on climate change (e.g. resignation of Hal Lewis, Ivar Giaever and other notable. #12;Some climate changes basics · IPCC = Intergovernmental Panel on Climate Change · The IPCC

Browder, Tom

397

Climate Change: Conflict, Security and Vulnerability Professor of Climate Change  

E-Print Network [OSTI]

Climate Change: Conflict, Security and Vulnerability Mike Hulme Professor of Climate Change Science, Society and Sustainability Group School of Environmental Sciences Rethinking Climate Change, Conflict security" "increase risk of conflicts among and within nations" #12;· from `climatic change' to `climate-change

Hulme, Mike

398

13 - How to change  

Science Journals Connector (OSTI)

Publisher Summary The process of converging or integrating security teams or functions can be very different for organizations, depending on their size, structure, and political ability to adopt a new formation or process. It is noted that major obstacles to change can include turf wars, power struggles, fear, lack of defined goals, and lack of information. It is observed that practice does not make security processes perfect but if repeated, correct practice moves the security program toward perfection. The chapter discusses best practice activities when preparing to make a change. Acquiring an executive-level sponsor is a key determinant in achieving success when converging security functions. It is important to have a clear and well-articulated vision for change. Defining exactly what the new vision is can be difficult and crucial. Any time there are changing or shifting roles in an organization, there can be some confusion. During the transition and education period, it is imperative to have a solid change management plan.

Dave Tyson

2007-01-01T23:59:59.000Z

399

Institutional Change for Sustainability | Department of Energy  

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

Institutional Change for Sustainability Institutional Change for Sustainability Institutional Change Continuous Improvement Cycle Institutional Change Continuous Improvement Cycle...

400

Global Climate Change Links  

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

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

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


401

Reduce Climate Change  

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

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

402

Observation of a Phase Transition of Stored Laser-Cooled Ions  

Science Journals Connector (OSTI)

Clouds of two to about fifty simultaneously stored, laser-cooled Mg+ ions in a Paul trap were observed in two phases, which are clearly distinguishable by their excitation spectra. Transitions between these phases can be induced either by a variation of the power of the laser radiation used to cool the ions or by a change of the size of the radio-frequency voltage applied to the trap. Transitions between a "crystalline" phase and a "gaseous" phase can be repeatedly observed by variation of the appropriate parameters. The two phases and the transitions between them have also been recorded by a photon-counting image system.

F. Diedrich; E. Peik; J. M. Chen; W. Quint; H. Walther

1987-12-28T23:59:59.000Z

403

Status of Climate Change  

E-Print Network [OSTI]

Status of Climate Change 2013 CaTee Conference San Antonio 2013 ESL-KT-13-12-56 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Menu for Today • IPCC 2013: Assessment Report #5 • Facts about Climate Change... • Who will Win, Who will Lose • What Needs to be Done ESL-KT-13-12-56 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 IPCC #5 • No great surprises - Sharper language • Uncertainties are still large • Essentially...

North, G.

2013-01-01T23:59:59.000Z

404

Climate Change Economics and Policy  

E-Print Network [OSTI]

AFRICA COLLEGE Centre for Climate Change Economics and Policy Adapting to Climate Change 3 CLIMATE...Furthermore, there is strong scientific evidence that climate change will disrupt the global economy, environment and society a growing population in a changing climate is, therefore, a major global challenge. Changes in climate

Romano, Daniela

405

Manifest CP violation from Majorana phases  

Science Journals Connector (OSTI)

We hunt for and discuss manifestly CP-violating effects which are mediated by Majorana phases. These phases are present if the standard model neutrinos are Majorana particles. We argue that while Majorana phases do affect the strength of neutrinoless double beta decay (a well known fact), they do so in a way that involves no manifest violation of CP. The conditions for manifestly CP-violating phenomena—differences between the rates for CP-mirror-image processes—are presented, and three examples are discussed: (i) neutrino ? antineutrino oscillation; (ii) rare decays of K and B mesons and their antiparticles; and (iii) the lepton asymmetry generated by the decay of hypothetical very heavy right-handed “seesaw” neutrinos. We also find that, for the case of degenerate light neutrinos, manifestly CP-violating effects in neutrino ? antineutrino oscillation vanish, although flavor-changing transitions do not. Finally, we comment on leptogenesis with degenerate right-handed neutrinos, and contrast it with the neutrino ? antineutrino oscillation case.

André de Gouvęa; Boris Kayser; Rabindra N. Mohapatra

2003-03-20T23:59:59.000Z

406

The Noncommutative Anandan's Quantum Phase  

E-Print Network [OSTI]

In this work we study the noncommutative nonrelativistic quantum dynamics of a neutral particle, that possesses permanent magnetic and electric dipole momenta, in the presence of an electric and magnetic fields. We use the Foldy-Wouthuysen transformation of the Dirac spinor with a non-minimal coupling to obtain the nonrelativistic limit. In this limit, we will study the noncommutative quantum dynamics and obtain the noncommutative Anandan's geometric phase. We analyze the situation where magnetic dipole moment of the particle is zero and we obtain the noncommutative version of the He-McKellar-Wilkens effect. We demonstrate that this phase in the noncommutative case is a geometric dispersive phase. We also investigate this geometric phase considering the noncommutativity in the phase space and the Anandan's phase is obtained.

E. Passos; L. R. Ribeiro; C. Furtado; J. R. Nascimento

2007-06-18T23:59:59.000Z

407

The Noncommutative Anandan's Quantum Phase  

E-Print Network [OSTI]

In this work we study the noncommutative nonrelativistic quantum dynamics of a neutral particle, that possesses permanent magnetic and electric dipole momenta, in the presence of an electric and magnetic fields. We use the Foldy-Wouthuysen transformation of the Dirac spinor with a non-minimal coupling to obtain the nonrelativistic limit. In this limit, we will study the noncommutative quantum dynamics and obtain the noncommutative Anandan's geometric phase. We analyze the situation where magnetic dipole moment of the particle is zero and we obtain the noncommutative version of the He-McKellar-Wilkens effect. We demonstrate that this phase in the noncommutative case is a geometric dispersive phase. We also investigate this geometric phase considering the noncommutativity in the phase space and the Anandan's phase is obtained.

Passos, E; Nascimento, J R; Ribeiro, L R

2006-01-01T23:59:59.000Z

408

NASA CHANGES SCIENCE FOCUS  

Science Journals Connector (OSTI)

NASA CHANGES SCIENCE FOCUS ... In the past year and a half, NASA has received a presidential plan to refocus its efforts with the goal of returning humans to the moon and then on to Mars. ... But the shift of scientific support has drawn concern from both Congress and other NASA followers. ...

SUSAN R. MORRISSEY

2005-07-04T23:59:59.000Z

409

General Indicators: Change from  

E-Print Network [OSTI]

Completed in 1 business day 81% -1% 100% - 78% 100% 80% Quality Inspections Completed 95% - - - - Utilities: See Definitions Document for descriptions of performance measures and specific color code target values. Trend status color indicators ­ identifies changes from the prior month: Steam/Chilled Water

Webb, Peter

410

General Indicators: Change from  

E-Print Network [OSTI]

3 Completed in 1 business day 67% -30% 100% 0% 100% 100% 67% Quality Inspections Completed - - 95% No Change 70% Key: See Definitions Document for descriptions of performance measures and specific color 1 100% 100% Steam/Chilled Water Electric Met Target Requires ReviewMissed Target Improvement Decline

Webb, Peter

411

General Indicators: Change from  

E-Print Network [OSTI]

100 4 11 2 75 Completed in 1 business day 92% -5% 100% 100% 100% 100% 91% Quality Inspections measures and specific color code target values. Trend status color indicators ­ identifies changes from the prior month: 100% 50% 70% - All Districts Combined 0 Electric 0 District Breakdown Steam/Chilled Water

Webb, Peter

412

General Indicators: Change from  

E-Print Network [OSTI]

100 0 5 3 84 Completed in 1 business day 97% +16% 100% - 100% 100% 96% Quality Inspections Completed-FLS 86% -7% 70% Key: See Definitions Document for descriptions of performance measures and specific color code target values. Trend status color indicators ­ identifies changes from the prior month: Steam

Webb, Peter

413

General Indicators: Change from  

E-Print Network [OSTI]

in 1 business day 99% +2% 100% 100% 100% 100% 99% Quality Inspections Completed 100% No Change 95% - - 100% Non-FLS 85% +5% 70% Key: See Definitions Document for descriptions of performance measures: 100% 84% 85% - All Districts Combined 2 Electric 1 District Breakdown Steam/Chilled Water Improvement

Webb, Peter

414

General Indicators: Change from  

E-Print Network [OSTI]

100 8 14 5 119 Completed in 1 business day 97% +17% 100% 88% 93% 100% 98% Quality Inspections measures and specific color code target values. Trend status color indicators ­ identifies changes from the prior month: All Districts Combined 0 Electric 2 District Breakdown Steam/Chilled Water - 55% 39

Webb, Peter

415

General Indicators: Change from  

E-Print Network [OSTI]

's): Quantity 10 +4 100 1 1 1 7 Completed in 1 business day 80% +13% 100% 100% 0% 100% 86% Quality Inspections% No Change 100% Non-FLS 65% -21% 70% Key: See Definitions Document for descriptions of performance measures: Steam/Chilled Water Electric 72% 58% 0 0 100% 100% Met Target Requires ReviewMissed Target Improvement

Webb, Peter

416

General Indicators: Change from  

E-Print Network [OSTI]

Completed in 1 business day 97% -2% 100% 100% 100% 100% 97% Quality Inspections Completed 100% No Change) - - - 100% Non-FLS 76% -9% 70% Key: See Definitions Document for descriptions of performance measures: All Districts Combined 1 Electric 0 District Breakdown Steam/Chilled Water - 78% 74% - Improvement

Webb, Peter

417

Indicators: Change from  

E-Print Network [OSTI]

's): Quantity 207 -39 100 16 24 5 5 157 Completed in 1 business day 84% -9% 100% 88% 100% 80% 100% 81% Quality measures and specific color code target values. Trend status color indicators ­ identifies changes from the prior month: Key: 50% 52% Electric - 26% All Zones Combined Zone Breakdown Steam/Chilled Water 3 0 All

Webb, Peter

418

Indicators: Change from  

E-Print Network [OSTI]

% Quality Inspections Completed 99% +3% 95% 100% 98% 99% 100% Utilities: Performance Statistics Current of performance measures and specific color code target values. Trend status color indicators ­ identifies changes Combined District Breakdown Steam/Chilled Water May 2008 All Districts Combined All Districts Combined

Webb, Peter

419

Climate Change and Transportation  

E-Print Network [OSTI]

, 2009, EPA sent report to OMB with finding that GHG emissions are an endangerment to the public's health that FHWA guidance will focus on planning- level approach to GHG ­ Effect on transportation projects;6 WSDOT Efforts · Climate Change Team · Project Level GHG Approach · Planning Level GHG Approach

Minnesota, University of

420

ENERGY FLOWS CLIMATE CHANGE  

E-Print Network [OSTI]

absorption of solar radiation. #12;AEROSOLS AS SEEN FROM SPACE Fire plumes from southern Mexico transportedENERGY FLOWS FORCINGS CLIMATE CHANGE A REALLY TOUGH PROBLEM Stephen E. Schwartz, BNL, 7-20-11 www average temperature 15°C or 59°F #12;ATMOSPHERIC RADIATION Power per area Energy per time per area Unit

Schwartz, Stephen E.

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


421

Climate Change Adaptation Planning  

E-Print Network [OSTI]

of Colorado Law School #12;What is Climate Change Adaptation? "Adjustment in natural or human systems: Vulnerability and Risk Assessments - Current Example - Golden Eagles on the Colorado Plateau Current impact: Golden eagle populations have been declining in portions of the western U.S. Source: BLM Colorado Plateau

Neff, Jason

422

THE WEEK'S PRICE CHANGES  

Science Journals Connector (OSTI)

THE WEEK'S PRICE CHANGES ... United Fuel Gas Co., Charleston, W. Va., has been authorized by Federal Power Commission to increase its wholesale rates for natural gas. ... Monarch Chemical Co., 161 East 42nd St., New York, announced at trie start of the month that it is advancing prices on its line of baking powders and creams, effective Aug. 31. ...

1953-08-17T23:59:59.000Z

423

Abrupt Climate Change  

Science Journals Connector (OSTI)

...the Cariaco Basin, offshore Venezuela (73...effects of stronger winds over the basin or...26), atmospheric energy-balance models...may arise from the wind-driven circulation...ice, or changes in wind-driven or other...shutdown that cite the Norway-Canada difference...

R. B. Alley; J. Marotzke; W. D. Nordhaus; J. T. Overpeck; D. M. Peteet; R. A. Pielke; Jr.; R. T. Pierrehumbert; P. B. Rhines; T. F. Stocker; L. D. Talley; J. M. Wallace

2003-03-28T23:59:59.000Z

424

Identifying the Bose glass phase  

E-Print Network [OSTI]

Introducing disorder into the Bose-Hubbard model at integer fillings leads to a Bose glass phase, along with the Mott insulator and superfluid phases. We suggest a new order parameter: the determinant of the one body density matrix, which is nonzero only within the Mott-insulator phase. Alongside the superfluid fraction, it is then possible to distinguish the three phases. The Bose glass phase is the only phase which has vanishing determinant and superfluid fraction. The vanishing of the determinant in the Bose glass phase occurs due to the partial fragmentation of the condensate into localized fragments, each with zero superfluid response, which implies the presence of unoccupied sites and hence the presence of lines of zeros in the one body density matrix. In the superfluid phase, the determinant vanish for another reason - due to the macroscopic occupation of a single particle state. Finally, we suggest the enhancement of the three body decay rate in the Bose glass phase, as an experimental indicator for the presence of localized fragments.

R. Pugatch; N. Bar-gill; N. Katz; E. Rowen; N. Davidson

2006-07-28T23:59:59.000Z

425

Phase correlations and optical coherence  

Science Journals Connector (OSTI)

We examine the properties of the recently introduced degrees of coherence regarding the phase correlations of the optical field. It is seen that some of these quantities are...

Tervo, Jani; Setälä, Tero; Friberg, Ari T

2012-01-01T23:59:59.000Z

426

Phase-Transfer-Catalyzed Oxidations  

Science Journals Connector (OSTI)

Phase-transfer catalysis (PTC) offers many excellent opportunities for conducting oxidation reactions using inexpensive primary oxidants such as oxygen, sodium hypochlorite, hydrogen peroxide, electrooxidation...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

427

Diffraction Studies of Ordered Phases and Phase Transitions  

E-Print Network [OSTI]

on graphite and A neutron scattering study of the diluted uniaxial dipolar coupled ferromagnets LiTb.3Y.7F4 transition, the critical neutron scattering of either crystal exhibits the asymmetry characteristic PHASES AND PHASE TRANSITIONS: A synchrotron x-ray scattering study of monolayers of CF4 adsorbed

428

book review: Climate change mapped  

E-Print Network [OSTI]

of millions 2 .   Climate change is a moving target and introductions  to  climate change’, the Atlas stands out media reporting on climate change.   Cambridge University 

Shanahan, Mike

2012-01-01T23:59:59.000Z

429

Climate Change at Annual Timescales  

E-Print Network [OSTI]

carbon cycling to global climate change, Nature, 393 (6682),2005. Meehl, G. , et al. , Climate Change 2007: The PhysicalIntergovernmental Panel on Climate Change, chap. 10. Global

Stine, Alexander Robin

2010-01-01T23:59:59.000Z

430

Climate Change, Adaptation, and Development  

E-Print Network [OSTI]

developing countries "can significantly offset the adverse effects of climate change").Climate Change, 2 which calls on developed countries (but not developing countries)developing countries that will bear the bulk of the effects of climate change.

Cole, Daniel H.

2008-01-01T23:59:59.000Z

431

Climate Change and National Security  

E-Print Network [OSTI]

associ- ated with climate change are multi-dimensional, andpotential consequences of climate change in coming decades.designed to forecast climate changes at mid-cen- tury and

Alyson, Fleming; Summer, Kelly; Summer, Martin; Lauren, Franck; Jonathan, Mark

2015-01-01T23:59:59.000Z

432

MAPPING CLIMATE CHANGE EXPOSURES, VULNERABILITIES,  

E-Print Network [OSTI]

MAPPING CLIMATE CHANGE EXPOSURES, VULNERABILITIES, AND ADAPTATION TO PUBLIC HEALTH RISKS's California Climate Change Center JULY 2012 CEC5002012041 Prepared for: California Energy Commission of California. #12; ii ABSTRACT This study reviewed first available frameworks for climate change adaptation

433

Farming: A Climate Change Culprit  

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

Farming: A Climate Change Culprit Farming: A Climate Change Culprit Simulations run at NERSC show impact of land-use change on African monsoon precipitation June 7, 2014 | Tags:...

434

Phasing Out the Phase Problem in Interfacial Crystallography  

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

BESSRC/XOR BESSRC/XOR Phasing Out the Phase Problem in Interfacial Crystallography Photo of Paul Fenter (left) and Zhan Zhang at the mineral-fluid interface spectrometer at 12-ID-D (BESSRC/XOR). Paul Fenter (left) and Zhan Zhang at the mineral-fluid interface spectrometer at 12-ID-D (BESSRC/XOR). Since the advent of dedicated synchrotron radiation facilities, the applications of x-ray diffraction and scattering for structure determination have expanded to include a broad range of materials, from proteins and interfaces to nanoparticles. However, the well-known "phase problem" of crystallography limits these applications. The phase problem arises because the complete description of a structure requires a complex structure factor having both a magnitude and a phase. The measured x-ray

435

Phase equilibria in a system of 'breathing' molecules  

SciTech Connect (OSTI)

It is now well known that details in the intermolecular potential can significantly affect the qualitative features of a phase diagram where temperature is plotted against density for the coexistence curves among fluid and solid phases. While previous calculations of phase diagrams have assumed a time-invariant potential function, this report concerns the phase diagram for ''breathing'' molecules, i.e., molecules whose strength of intermolecular attraction fluctuates in time. Such fluctuations can occur in biomacromolecules where an active site can switch between ''on'' and ''off'' positions. Phase-equilibrium calculations were performed for molecules that have a periodic (breathing) attractive force in addition to the conventional intermolecular forces. The phase diagram for such molecules is as expected when the ''breathing'' properties are independent of density. However, when (more realistically), the ''breathing'' properties are density dependent, the phase diagram exhibits dramatic changes. These calculations may be useful for interpreting experimental data for protein precipitation, for plaque formation in blood vessels and for scaffold-supported tissue formation.

Wu, Jianzhong; Prausnitz, John

2001-09-30T23:59:59.000Z

436

Phase control of electron population, absorption, and dispersion properties of a semiconductor quantum well  

SciTech Connect (OSTI)

We show that an asymmetric semiconductor quantum well that forms a three-level cascade configuration can be controlled by the relative phase of a laser field and its second harmonic. The electron population in the three subbands and the probe absorption/dispersion spectra are crucially phase dependent. As an example, electron inversion between the upper and lower subbands and change of the spectrum from absorption to gain is found by solely varying the relative phase of the two fields.

Dynes, J. F.; Paspalakis, E. [London Center for Nanotechnology, London WC1H 0AH (United Kingdom); Materials Science Department, School of Natural Sciences, University of Patras, Patras 265 04 (Greece)

2006-06-15T23:59:59.000Z

437

Institutional Change Process for Sustainability  

Broader source: Energy.gov [DOE]

For establishing institutional change in a Federal agency to achieve sustainability or other energy efficiency goals, follow the five-step institutional change process. In accordance with the...

438

Urban Growth and Climate Change  

E-Print Network [OSTI]

1999, Climate Change, Agriculture, and Developing Countries:climate change matters because it is likely to be the case that local governments in developing countries

Kahn, Matthew E.

2008-01-01T23:59:59.000Z

439

Strategies for Achieving Institutional Change  

Broader source: Energy.gov [DOE]

Many strategies—including those derived from Institutional Change Principles–may be used to effect institutional change in support of energy and sustainability objectives.

440

Climate Change | Department of Energy  

Energy Savers [EERE]

adaptive capacity and amplify potential impacts. Source: Gautam, M. R.; Chief, K.; Smith Jr., W.J. (2013). Climatic Change Climate Change Webinar Series Recordings and...

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


441

An extremely sharp phase transition threshold for the slow growing hierarchy  

E-Print Network [OSTI]

threshold point'. An everyday life example of this is the change from one material state to a different oneAn extremely sharp phase transition threshold for the slow growing hierarchy Andreas Weiermann of. This article is part of our general research program on phase transitions in logic

Weiermann, Andreas

442

Raman Spectroscopic and Ultrasonic Measurements to Monitor the HMX ( ) Phase Transition  

SciTech Connect (OSTI)

The HMX {beta}-{delta} solid-solid phase transition, which occurs as HMX is heated near 170 C, is clearly linked to increased reactivity and sensitivity to initiation. Thermally damaged energetic materials (EMs) containing HMX therefore may present a safety concern. Information about the phase transition is vital to a predictive safety model for HMX and HMX-containing EMs. We report work in progress on monitoring the phase transition with real-time Raman spectroscopy and ultrasonic measurements aimed towards a better understanding of physical properties through the phase transition. HMX samples were confined with minimal free volume.in a cell with constant volume. The cell was heated at a controlled rate and real-time Raman spectroscopic or ultrasonic measurements were performed. Raman spectroscopy provides a clear distinction between the two phases because the vibrational transitions of the molecule change with confirmational changes associated with the phase transition. Ultrasonic time-of-flight measurements provide an additional method of distinguishing the two phases because the sound speed through the material changes with the phase transition. Ultrasonic attenuation measurements also provide information about microstructural changes such as increased porosity due to evolution of gaseous decomposition products.

GIESKE,JOHN H.; MILLER,JILL C.; RENLUND,ANITA M.; TAPPAN,ALEXANDER S.

1999-10-14T23:59:59.000Z

443

Diffusion Maps for Changing Data Diffusion Maps for Changing Data  

E-Print Network [OSTI]

Diffusion Maps for Changing Data Diffusion Maps for Changing Data Matthew J. Hirn Department;Diffusion Maps for Changing Data Collaborators Ronald Coifman (Yale University) Roy Lederman (Yale University) #12;Diffusion Maps for Changing Data How to compare images across sensors? Figure: Sokolov Mine

Hirn, Matthew

444

Diffusion Maps for Changing Data Diffusion Maps for Changing Data  

E-Print Network [OSTI]

Diffusion Maps for Changing Data Diffusion Maps for Changing Data Matthew J. Hirn Department of Mathematics Yale University July 26, 2012 Bell Labs #12;Diffusion Maps for Changing Data Collaborators Joint work with Ronald Coifman and Roy Lederman. #12;Diffusion Maps for Changing Data Overview 1 High

Hirn, Matthew

445

Diffusion Maps for Changing Data Diffusion Maps for Changing Data  

E-Print Network [OSTI]

Diffusion Maps for Changing Data Diffusion Maps for Changing Data Matthew J. Hirn Department in Honor of the 70th Birthday of David R. Larson #12;Diffusion Maps for Changing Data Collaborators Joint work with Ronald Coifman and Roy Lederman. #12;Diffusion Maps for Changing Data High Dimensional Data

Hirn, Matthew

446

Diffusion Maps for Changing Data Diffusion Maps for Changing Data  

E-Print Network [OSTI]

Diffusion Maps for Changing Data Diffusion Maps for Changing Data Matthew J. Hirn September 3, 2013 #12;Diffusion Maps for Changing Data Collaborators Simon Adar, Tel Aviv University Eyal Ben Dor, Tel, Clarkson University Yoel Shkolnisky, Tel Aviv University #12;Diffusion Maps for Changing Data Heat equation

Hirn, Matthew

447

Chang-F-L  

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

Effect of Droplet Size Distribution on the Effect of Droplet Size Distribution on the Determination of Cloud Droplet Effective Radius F.-L. Chang and Z. Li ESSIC/Department of Meteorology University of Maryland College Park, Maryland F.-L. Chang Canada Centre for Remote Sensing Ottawa, Ontario, Canada Introduction Cloud microphysical processes can provide links between cloud radiative effect and hydrological cycle and create several feedback mechanisms linking clouds and climate. For instance, the aerosols can affect the climate through their indirect effect on clouds, which modifies cloud microphysical properties and hence cloud radiative properties, proving an increase in cloud albedo and a net radiative cooling (Twomey et al. 1984; Charlson et al. 1992). The key microphysical parameters affecting both radiation

448

Three phase downhole separator process  

DOE Patents [OSTI]

Three Phase Downhole Separator Process (TPDSP) is a process which results in the separation of all three phases, (1) oil, (2) gas, and (3) water, at the downhole location in the well bore, water disposal injection downhole, and oil and gas production uphole.

Cognata, Louis John (Baytown, TX)

2008-06-24T23:59:59.000Z

449

The changing atmosphere  

SciTech Connect (OSTI)

The chemistry of the atmosphere is changing, in large measure because of gases emitted by such human activities as farming, manufacturing, and the combustion of fossil fuels. The deleterious effects are increasingly evident; they may well become worse in the years ahead. This paper discusses the pollutants and the environmental perturbations with which they are associated. The authors believe the solution to the earth's environmental problems lies in a truly global effort.

Graedel, T.E.; Crutzen, P.J.

1989-09-01T23:59:59.000Z

450

Frogs that change sex  

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

Frogs that change sex Frogs that change sex Name: Mike A Smola Age: N/A Location: N/A Country: N/A Date: N/A Question: Why can frogs (some species) change sex? Replies: This is a complex subject. Several studies have exposed some of the answers to this question, but a definitive answer is yet to be made. It all boils down to the level of which genes are activated. Studies have shown that the sex chromosomes are not necessarily the determining factor. The traditional display of a female is when an individual has two X chromosomes present. When one of these genes is a Y, it is a male. This tends to be the case for most organisms that sport individuals that are different sexes. However, the Y chromosomes has been almost always a male determining chromosome, but with molecular biology and genetic engineering techniques, a male can be made from a XX combination and females have developed from XY combinations. These are extremely rare, but they have given insight to the fact that there are other factors beside X and Y chromosomes that determine sex, probably a gene found in both chromosomes.

451

Continuous Change Institutional Change Principle | Department of Energy  

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

Continuous Change Institutional Change Principle Continuous Change Institutional Change Principle Continuous Change Institutional Change Principle October 8, 2013 - 11:13am Addthis Because it takes time to establish institutional change, Federal agencies need multiyear plans that continuously work to achieve, reinforce, and improve significant and persistent sustainability goals. Sustainability efforts ultimately may fail unless organizational change becomes "the way we do business." This principle is in line with organization research showing that institutional change is a multiyear process. Methods Institutional change is a long process that requires patience and persistence. For instance, the trial period for a new behavior must be long enough to allow people to form new habits. The key is to think long-term

452

Climate Change Proposed Scoping Plan  

E-Print Network [OSTI]

Climate Change Proposed Scoping Plan a amework for change Prepared by the California Air Resources #12;CLIMATE CHANGE SCOPING PLAN State of California Air Resources Board Resolution 08-47 December 11 greenhouse gas (GHG) emissions that cause global warming; WHEREAS, the adverse impacts of climate change

453

Abrupt Climate Change Inevitable Surprises  

E-Print Network [OSTI]

Abrupt Climate Change Inevitable Surprises Committee on Abrupt Climate Change Ocean Studies Board of Congress Cataloging-in-Publication Data Abrupt climate change : inevitable surprises / Committee on Abrupt Climate Change, Ocean Studies Board, Polar Research Board, Board on Atmospheric Sciences and Climate

454

Conservation and Global Climate Change  

E-Print Network [OSTI]

V.6 Conservation and Global Climate Change Diane M. Debinski and Molly S. Cross OUTLINE 1. Introduction 2. How climate is changing 3. Environmental responses to climate change 4. Consequences of climate the coming decades will be preserving biodiversity in the face of climate change. It has become increasingly

Landweber, Laura

455

SNMR pulse sequence phase cycling  

DOE Patents [OSTI]

Technologies applicable to SNMR pulse sequence phase cycling are disclosed, including SNMR acquisition apparatus and methods, SNMR processing apparatus and methods, and combinations thereof. SNMR acquisition may include transmitting two or more SNMR pulse sequences and applying a phase shift to a pulse in at least one of the pulse sequences, according to any of a variety cycling techniques. SNMR processing may include combining SNMR from a plurality of pulse sequences comprising pulses of different phases, so that desired signals are preserved and indesired signals are canceled.

Walsh, David O; Grunewald, Elliot D

2013-11-12T23:59:59.000Z

456

LDRD final report : raman spectroscopic measurements to monitor the HMX beta-delta phase transition.  

SciTech Connect (OSTI)

The HMX {beta}-{delta} solid-solid phase transition, which occurs as HMX is heated near 170 C, is linked to increased reactivity and sensitivity to initiation. Thermally damaged energetic materials (EMs) containing HMX therefore may present a safety concern. Information about the phase transition is vital to predictive safety models for HMX and HMX-containing EMs. We report work on monitoring the phase transition with real-time Raman spectroscopy aimed towards obtaining a better understanding of physical properties of HMX through the phase transition. HMX samples were confined in a cell of minimal free volume in a displacement-controlled or load-controlled arrangement. The cell was heated and then cooled at controlled rates while real-time Raman spectroscopic measurements were performed. Raman spectroscopy provides a clear distinction between the phases of HMX because the vibrational transitions of the molecule change with conformational changes associated with the phase transition. Temperature of phase transition versus load data are presented for both the heating and cooling cycles in the load-controlled apparatus, and general trends are discussed. A weak dependence of the temperature of phase transition on load was discovered during the heating cycle, with higher loads causing the phase transition to occur at a higher temperature. This was especially true in the temperature of completion of phase transition data as opposed to the temperature of onset of phase transition data. A stronger dependence on load was observed in the cooling cycle, with higher loads causing the reverse phase transitions to occur at a higher cooling temperature. Also, higher loads tended to cause the phase transition to occur over a longer period of time in the heating cycle and over a shorter period of time in the cooling cycle. All three of the pure HMX phases ({alpha}, {beta} and {delta}) were detected on cooling of the heated samples, either in pure form or as a mixture.

Renlund, Anita Mariana; Tappan, Alexander Smith; Miller, Jill C.

2000-11-01T23:59:59.000Z

457

Formation of carbonaceous nano-layers under high interfacial pressures during lubrication with mineral and bio-based oils  

SciTech Connect (OSTI)

In order to better protect steel surfaces against wear under high loads, understanding of chemical reactions between lubricants and metal at high interfacial pressures and elevated temperatures needs to be improved. Solutions at 5 to 20 wt. % of zinc di-2-ethylhexyl dithio phosphate (ZDDP) and chlorinated paraffins (CP) in inhibited paraffinic mineral oil (IPMO) and inhibited soy bean oil (ISBO) were compared on a Twist Compression Tribotester (TCT) at 200 MPa. Microscopy of wear tracks after 10 seconds tribotesting showed much smoother surface profiles than those of unworn areas. X-ray photoelectron spectroscopy (XPS) coupled with Ar-ion sputtering demonstrated that additive solutions in ISBO formed 2–3 times thicker carbon-containing nano-layers compared to IPMO. The amounts of Cl, S or P were unexpectedly low and detectable only on the top surface with less than 5 nm penetration. CP blends in IPMO formed more inorganic chlorides than those in ISBO. It can be concluded that base oils are primarily responsible for the thickness of carbonaceous nano-layers during early stages of severe boundary lubrication, while CP or ZDDP additive contributions are important, but less significant.

Baltrus, John P. [U.S. DOE

2014-01-01T23:59:59.000Z

458

Effect of dimensionality on vapor-liquid phase transition  

SciTech Connect (OSTI)

Dimensionality play significant role on ‘phase transitions’. Fluids in macroscopic confinement (bulk or 3-Dimensional, 3D) do not show significant changes in their phase transition properties with extent of confinement, since the number of molecules away from the surrounding surfaces is astronomically higher than the number of molecules in close proximity of the confining surfaces. In microscopic confinement (quasi 3D to quasi-2D), however, the number of molecules away from the close proximity of the surface is not as high as is the case with macroscopic (3D) confinement. Hence, under the same thermodynamic conditions ‘phase transition’ properties at microscopic confinement may not remain the same as the macroscopic or 3D values. Phase transitions at extremely small scale become very sensitive to the dimensions as well as the surface characteristics of the system. In this work our investigations reveal the effect of dimensionality on the phase transition from 3D to quasi-2D to 2D behavior. We have used grand canonical transition matrix Monte Carlo simulation to understand the vapor–liquid phase transitions from 3D to quasi-2D behavior. Such studies can be helpful in understanding and controlling the fluid film behaviour confined between solid surfaces of few molecular diameters, for example, in lubrication applications.

Singh, Sudhir Kumar, E-mail: sksingh@thapar.edu [Department Chemical Engineering, Thapar University, Patiala-147004 Punjab (India)

2014-04-24T23:59:59.000Z

459

Property:GEADevelopmentPhase | Open Energy Information  

Open Energy Info (EERE)

GEADevelopmentPhase GEADevelopmentPhase Jump to: navigation, search Property Name GEADevelopmentPhase Property Type Page Description GEA Development Phase, as characterized by their Annual U.S. Geothermal Power Production and Development Report. See GEA_Development_Phases Allows Values Phase I - Resource Procurement and Identification;Phase II - Resource Exploration and Confirmation;Phase III - Permitting and Initial Development;Phase IV - Resource Production and Power Plant Construction Subproperties This property has the following 77 subproperties: A Abraham Hot Springs Geothermal Area Adak Geothermal Area Akun Strait Geothermal Area Akutan Fumaroles Geothermal Area Alum Geothermal Area Alvord Hot Springs Geothermal Area Amedee Geothermal Area Arrowhead Hot Springs Geothermal Area

460

Phase projection using three satellites  

E-Print Network [OSTI]

This study seeks to investigate various techniques used in Interferometric Synthetic Aperture Radar (InSAR) during the phase unwrapping process and the noise filtering step. In particular, as intuition would follow, we ...

Yeung, Michael C. (Michael Chi-Hang)

2007-01-01T23:59:59.000Z

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


461

Agenda Phase 2 Industry Day  

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

JCTD Deputy Transition Manager, NAVFAC EXWC 11:00 - 11:15 Ft. Carson Sustainability and Net Zero Plan and Successes Hal Alguire, Director DPW 11:15 - 11:30 Phase 3, Future plans...

462

Precision digital pulse phase generator  

DOE Patents [OSTI]

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code. 2 figs.

McEwan, T.E.

1996-10-08T23:59:59.000Z

463

Phase retrieval with prior information  

Science Journals Connector (OSTI)

An algorithm for phase retrieval with Bayesian statistics is discussed. It is shown how the statistics of Kolmogorov turbulence can be used to compute the likelihood for a particular...

Irwan, R; Lane, R G

1998-01-01T23:59:59.000Z

464

Gas-phase chemical dynamics  

SciTech Connect (OSTI)

Research in this program is directed towards the spectroscopy of small free radicals and reactive molecules and the state-to-state dynamics of gas phase collision, energy transfer, and photodissociation phenomena. Work on several systems is summarized here.

Weston, R.E. Jr.; Sears, T.J.; Preses, J.M. [Brookhaven National Laboratory, Upton, NY (United States)

1993-12-01T23:59:59.000Z

465

Phase-Transfer-Catalyzed Reductions  

Science Journals Connector (OSTI)

Phase-transfer catalysis (PTC) procedures that have been developed for use with sodium borohydride, lithium aluminum hydride, and several other reducing agents involving anion transfer to organic media are des...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

466

Insoluble Phase-Transfer Catalysts  

Science Journals Connector (OSTI)

An important problem facing the designer of industrial phase-transfer catalysis (PTC) processes using soluble PTC catalysts concerns the removal of the catalyst from the reaction mixture, and its economic recy...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

467

Precision digital pulse phase generator  

DOE Patents [OSTI]

A timing generator comprises a crystal oscillator connected to provide an output reference pulse. A resistor-capacitor combination is connected to provide a variable-delay output pulse from an input connected to the crystal oscillator. A phase monitor is connected to provide duty-cycle representations of the reference and variable-delay output pulse phase. An operational amplifier drives a control voltage to the resistor-capacitor combination according to currents integrated from the phase monitor and injected into summing junctions. A digital-to-analog converter injects a control current into the summing junctions according to an input digital control code. A servo equilibrium results that provides a phase delay of the variable-delay output pulse to the output reference pulse that linearly depends on the input digital control code.

McEwan, Thomas E. (Livermore, CA)

1996-01-01T23:59:59.000Z

468

Study Climate and Global Change  

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

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

469

ARM - Baseline Change Request Guidelines  

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

DocumentsBaseline Change Request Guidelines DocumentsBaseline Change Request Guidelines Page Contents Introduction Submit a BCR BCR Process Flowchart Baseline Change Request Guidelines Introduction Baseline Change Requests (BCR) are used by the ARM Infrastructure as a process to provide configuration control and for formally requesting and documenting changes within the ARM Infrastructure. Configuration Control: BCRs are required for changes to instruments, data systems, data processes, datastreams, measurement methods, and facilities. They help ensure that all aspects of the ARM Infrastructure are consulted prior to implementing changes. Seemingly minor changes can have significant repercussions throughout the Facility and therefore, NO change to an operational instrument, computer, facility, or other system can or will be

470

Temperature-Driven Structural Phase Transition for Trapped Ions and a Proposal for its Experimental Detection  

SciTech Connect (OSTI)

A Wigner crystal formed with trapped ions can undergo a structural phase transition, which is determined only by the mechanical conditions on a classical level. Instead of this classical result, we show that through consideration of quantum and thermal fluctuation, a structural phase transition can be driven solely by a change in the system's temperature. We determine a finite-temperature phase diagram for trapped ions using the renormalization group method and the path integral formalism, and propose an experimental scheme to observe the predicted temperature-driven structural phase transition, which is well within the reach of the current ion trap technology.

Gong Zhexuan; Lin, G.-D.; Duan, L.-M. [Department of Physics and MCTP, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2010-12-31T23:59:59.000Z

471

Temperature-Driven Structural Phase Transition for Trapped Ions and a Proposal for its Experimental Detection  

Science Journals Connector (OSTI)

A Wigner crystal formed with trapped ions can undergo a structural phase transition, which is determined only by the mechanical conditions on a classical level. Instead of this classical result, we show that through consideration of quantum and thermal fluctuation, a structural phase transition can be driven solely by a change in the system’s temperature. We determine a finite-temperature phase diagram for trapped ions using the renormalization group method and the path integral formalism, and propose an experimental scheme to observe the predicted temperature-driven structural phase transition, which is well within the reach of the current ion trap technology.

Zhe-Xuan Gong; G.-D. Lin; L.-M. Duan

2010-12-29T23:59:59.000Z

472

Temperature driven structural phase transition for trapped ions and its experimental detection  

E-Print Network [OSTI]

A Wigner crystal formed with trapped ion can undergo structural phase transition, which is determined only by the mechanical conditions on a classical level. Instead of this classical result, we show that through consideration of quantum and thermal fluctuation, a structural phase transition can be solely driven by change of the system's temperature. We determine a finite-temperature phase diagram for trapped ions using the renormalization group method and the path integral formalism, and propose an experimental scheme to observe the predicted temperature-driven structural phase transition, which is well within the reach of the current ion trap technology.

Zhe-Xuan Gong; G. -D. Lin; L. -M. Duan

2010-09-01T23:59:59.000Z

473

Local Wettability Reversal during Steady-State Two-Phase Flow in Porous Media  

E-Print Network [OSTI]

We study the effect of local wettability reversal on remobilizing immobile fluid clusters in steady-state two-phase flow in porous media. We consider a two dimensional network model for porous medium and introduce a wettability alteration mechanism. A qualitative change in the steady state flow patterns, destabilizing the percolating and trapped clusters, is observed as the system wettability is varied. When capillary forces are strong a finite wettability alteration is necessary to move the system from single-phase to two-phase flow regime. For the case of both phases being mobile we find a linear relationship between fractional flow and wettability alteration.

Sinha, Santanu; Řdegĺrden, Torgeir Bryge; Skjetne, Erik; Hansen, Alex; 10.1103/PhysRevE.84.037303

2012-01-01T23:59:59.000Z

474

Determine Institutional Change Sustainability Goals | Department...  

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

Determine Institutional Change Sustainability Goals Determine Institutional Change Sustainability Goals Institutional Change Continuous Improvement Cycle The first step in the...

475

Institutional Change for Sustainability Contacts | Department...  

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

Institutional Change for Sustainability Contacts Institutional Change for Sustainability Contacts For more information about institutional change for sustainability, contact: Jerry...

476

DOE Administrative Records Schedules Changes | Department of...  

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

Administrative Records Schedules Changes DOE Administrative Records Schedules Changes Changes posted to Administrative Records Schedules DOE Administrative Records Schedules...

477

Shotgun proteomic monitoring of Clostridium acetobutylicum during stationary phase of butanol fermentation using xylose and comparison with the exponential phase  

SciTech Connect (OSTI)

Economically viable production of solvents through acetone butanol ethanol (ABE) fermentation requires a detailed understanding of Clostridium acetobutylicum. This study focuses on the proteomic profiling of C. acetobutylicum ATCC 824 from the stationary phase of ABE fermentation using xylose and compares with the exponential growth by shotgun proteomics approach. Comparative proteomic analysis revealed 22.9% of the C. acetobutylicum genome and 18.6% was found to be common in both exponential and stationary phases. The proteomic profile of C. acetobutylicum changed during the ABE fermentation such that 17 proteins were significantly differentially expressed between the two phases. Specifically, the expression of five proteins namely, CAC2873, CAP0164, CAP0165, CAC3298, and CAC1742 involved in the solvent production pathway were found to be significantly lower in the stationary phase compared to the exponential growth. Similarly, the expression of fucose isomerase (CAC2610), xylulose kinase (CAC2612), and a putative uncharacterized protein (CAC2611) involved in the xylose utilization pathway were also significantly lower in the stationary phase. These findings provide an insight into the metabolic behavior of C. acetobutylicum between different phases of ABE fermentation using xylose.

Sivagnanam, Kumaran [McGill University, Montreal, Quebec; Raghavan, Vijaya G. S. [McGill University, Montreal, Quebec; Shah, Manesh B [ORNL; Hettich, Robert {Bob} L [ORNL; Verberkmoes, Nathan C [ORNL; Lefsrud, Mark G [McGill University, Montreal, Quebec

2012-01-01T23:59:59.000Z

478

Summary of Changes  

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

to to Procedure 200.4 Records Management Revised Version Issued as P 200.4B LM Procedure 200.4, Records Management of 3/14/07 has undergone revisions. The procedure has been revised to reflect changes in definitions and formatting and to reflect LM's increased emphasis on electronic records. Please replace LM Procedure 200.4A with LM Procedure 200.4B. The most recent and official controlled hard copy version of this document resides with LM's Directives Coordinator. An electronic version of the controlled document has been placed on the LM Intranet for employee use. Printed hard copies of this electronic version are considered uncontrolled documents. INITIATED BY: Office of Business Operations NO. OF PAGES/ATTACHMENTS: 19 pages, 9 attachments

479

Diffusion Maps for Changing Data Diffusion Maps for Changing Data  

E-Print Network [OSTI]

Diffusion Maps for Changing Data Diffusion Maps for Changing Data Matthew J. Hirn Department of Mathematics Yale University November 29, 2012 Kansas State University Colloquium #12;Diffusion Maps;Diffusion Maps for Changing Data How to compare images across sensors? Figure: Sokolov Mine in 2009 and 2010

Hirn, Matthew

480

Climate Systems and Climate Change Is Climate Change Real?  

E-Print Network [OSTI]

Chapter 10 Climate Systems and Climate Change #12;Is Climate Change Real? 1980 1898 2005 2003 #12;Arctic Sea Ice Changes #12;Observed Global Surface Air Temperature #12;! Current climate: weather station data, remote sensing data, numerical modeling using General Circulation Models (GCM) ! Past climate

Pan, Feifei

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


481

Oceanic oxygen changes as a bellwether of climate change  

E-Print Network [OSTI]

Oceanic oxygen changes as a bellwether of climate change Term paper in Biogeochemistry@ethz.ch] Tutor: Prof. Dr. Nicholas Gruber [nicholas.gruber@env.ethz.ch] Abstract The response of oceanic oxygen of climate change. Recent publications indicate that the oceanic oxygen outgassing is substaintially larger

Fischlin, Andreas

482

PHOTOSYNTHESIS AND GLOBAL CHANGE CAN CLIMATE DRIVEN CHANGES IN  

E-Print Network [OSTI]

PHOTOSYNTHESIS AND GLOBAL CHANGE CAN CLIMATE DRIVEN CHANGES IN PHOTOSYNTHESIS BE USED TO PREDICT in photosynthesis, and thus substrate supply, influence the rate of ecosystem respiration (Re). Further- more in photosynthesis might result in concomitant changes in both the rate, and temperature-sensitivity, of Re. Re

Barron-Gafford, Greg

483

Mechanism of the [alpha]-to-[beta] phase transformation in the LaNi[subscript 5]?H[subscript 2] system  

SciTech Connect (OSTI)

High-energy synchrotron in situ X-ray powder diffraction has been used to elucidate the mechanism of the hydriding phase transformation in a LaNi5 model hydrogen storage intermetallic in real time. The transformation proceeds at 10 C via the transient growth of an interfacial phase, the {gamma} phase, with lattice parameters intermediate between those of the {alpha} (dilute solid solution) and {beta} (concentrated hydride) phases. The {gamma} phase forms to partially accommodate the 24% change in unit cell volume between the {alpha} and {beta} phases during hydriding and dehydriding. The {alpha}, {gamma} and {beta} phases coexist at the nanoscopic level.

Gray, E. MacA.; Blach, T.P.; Pitt, M.P.; Cookson, D.J. (Griffith U); (ASRP)

2014-09-24T23:59:59.000Z

484

The Western Wind and Solar Integration Study Phase 2  

SciTech Connect (OSTI)

The electric grid is a highly complex, interconnected machine, and changing one part of the grid can have consequences elsewhere. Adding wind and solar affects the operation of the other power plants and adding high penetrations can induce cycling of fossil-fueled generators. Cycling leads to wear-and-tear costs and changes in emissions. Phase 2 of the Western Wind and Solar Integration Study (WWSIS-2) evaluated these costs and emissions and simulated grid operations for a year to investigate the detailed impact of wind and solar on the fossil-fueled fleet. This built on Phase 1, one of the largest wind and solar integration studies ever conducted, which examined operational impacts of high wind and solar penetrations in the West.

Lew, D.; Brinkman, G.; Ibanez, E.; Hodge, B. M.; Hummon, M.; Florita, A.; Heaney, M.

2013-09-01T23:59:59.000Z

485

Western Wind and Solar Integration Study Phase 2 (Presentation)  

SciTech Connect (OSTI)

This presentation accompanies Phase 2 of the Western Wind and Solar Integration Study, a follow-on to Phase 1, which examined the operational impacts of high penetrations of variable renewable generation on the electric power system in the West and was one of the largest variable generation studies to date. High penetrations of variable generation can induce cycling of fossil-fueled generators. Cycling leads to wear-and-tear costs and changes in emissions. Phase 2 calculated these costs and emissions, and simulated grid operations for a year to investigate the detailed impact of variable generation on the fossil-fueled fleet. The presentation highlights the scope of the study and results.

Lew, D.; Brinkman, G.; Ibanez, E.; Kumar, N.; Lefton, S.; Jordan, G.; Venkataraman, S.; King, J.

2013-06-01T23:59:59.000Z

486

Computational phase imaging based on intensity transport  

E-Print Network [OSTI]

Light is a wave, having both an amplitude and a phase. However, optical frequencies are too high to allow direct detection of phase; thus, our eyes and cameras see only real values - intensity. Phase carries important ...

Waller, Laura A. (Laura Ann)

2010-01-01T23:59:59.000Z

487

Phase-Transfer Catalysis: Fundamentals I  

Science Journals Connector (OSTI)

Critical to the success of phase-transfer catalytic (PTC) processes are (1) the maximization of the rate of transfer of reactant anions from the aqueous or solid phase to the organic phase, (2) the maximizatio...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

488

Phase-Transfer Catalysis: Fundamentals II  

Science Journals Connector (OSTI)

Phase-transfer catalytic (PTC) systems are characterized by the presence of at least two phases and at least one interfacial region separating the phases [1–8]. Reactions taking place in such systems usually i...

Charles M. Starks; Charles L. Liotta; Marc E. Halpern

1994-01-01T23:59:59.000Z

489

Climate Change | Department of Energy  

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

Climate Change Climate Change September 16, 2014 C3E Spotlights Women Leaders in Clean Energy Careers Women clean energy leaders convene in Boston for the Women in Clean Energy...

490

Peak Oil and Climate Change  

Science Journals Connector (OSTI)

For most people “climate change” is synonymous with the “greenhouse effect.” A critical factor in climate change is emissions of carbon dioxide, CO2. In this chapter we restrict our discussion primarily to the qu...

Kjell Aleklett

2012-01-01T23:59:59.000Z

491

ARM - Predictions of Climate Change  

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

climate change which rarely lasts more than two years. Climate change from the greenhouse effect would last much longer. What will happen to the fish off South America? What...

492

Big Sky Carbon Sequestration Partnership--Validation Phase  

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

Big Sky Carbon Sequestration Big Sky Carbon Sequestration Partnership-Validation Phase Background The U.S. Department of Energy (DOE) has selected seven partnerships, through its Regional Carbon Sequestration Partnership (RCSP) initiative, to determine the best approaches for capturing and permanently storing carbon dioxide (CO 2 ), a greenhouse gas (GHG) which can contribute to global climate change. The RCSPs are made up of state and local agencies, coal companies, oil and gas companies, electric utilities,

493

West Coast Regional Carbon Sequestration Partnership--Validation Phase  

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

West Coast Regional Carbon Sequestration West Coast Regional Carbon Sequestration Partnership-Validation Phase Background The U.S. Department of Energy (DOE) has selected seven partnerships, through its Regional Carbon Sequestration Partnership (RCSP) initiative, to determine the best approaches for capturing and permanently storing carbon dioxide (CO 2 ), a greenhouse gas (GHG) which can contribute to global climate change. The RCSPs are made up of state and local agencies, coal companies, oil and gas companies,

494

Southwest Regional Partnership for Carbon Sequestration--Validation Phase  

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

Southwest Regional Partnership for Southwest Regional Partnership for Carbon Sequestration-Validation Phase Background The U.S. Department of Energy (DOE) has selected seven partnerships, through its Regional Carbon Sequestration Partnership (RCSP) initiative, to determine the best approaches for capturing and permanently storing carbon dioxide (CO 2 ), a greenhouse gas (GHG) which can contribute to global climate change. The RCSPs are made up of state and local agencies, coal companies, oil and gas companies, electric utilities,

495

Phase Diagram of Fully Developed Drainage in Porous Media  

SciTech Connect (OSTI)

Using concepts of invasion percolation in a gradient, we develop a phase diagram of fully developed drainage in porous media. The transition between stabilized displacement (where the conventional continuum applies) and fingering is controlled by the change of the sign of the gradient of the percolation probability (from stabilizing to destabilizing). The transition boundary is described by scaling laws. {copyright} {ital 1997} {ital The American Physical Society}

Yortsos, Y.C.; Xu, B. [Petroleum Engineering Program, Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211 (United States)] [Petroleum Engineering Program, Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211 (United States); Salin, D. [Laboratoire Fluides, Automatique et Systemes Thermiques, Universite Paris VI and XI, associated with C.N.R.S. (URA 871), Batiment 502, Campus Universitaire, 91405 Orsay Cedex (France)] [Laboratoire Fluides, Automatique et Systemes Thermiques, Universite Paris VI and XI, associated with C.N.R.S. (URA 871), Batiment 502, Campus Universitaire, 91405 Orsay Cedex (France)

1997-12-01T23:59:59.000Z

496

Science policy changes in Canada  

Science Journals Connector (OSTI)

... and such was the case with those made recently about the forthcoming changes in federal science bodies in Canada.

David Spurgeon

1974-03-15T23:59:59.000Z

497

COULD CHANGE EXCELLENCE, INNOVATION, LEADERSHIP  

E-Print Network [OSTI]

that have changed the world.It is an academic and research powerhouse ranked among the world's leading

498

Analysis and design of some new single phase to three phase static converters  

E-Print Network [OSTI]

three phase ac motor. In Chapter III, four single phase to three phase converters for fixed frequency, fixed voltage operation is proposed. They are divided into two categories: (a) half-bridge converters and (b) full-bridge converters. Suitable...? Experimental results oi' the half-bridge single phase to three phase con- verter. . . . . . . . , . . . . . . . . 58 CHAPTER I INTRODUCTION Single phase to three phase converters are widely used where three phase ac motors need to be operated from a...

Rahman, Ashek

2012-06-07T23:59:59.000Z

499

Understanding and Attributing Climate Change  

E-Print Network [OSTI]

9 Understanding and Attributing Climate Change Coordinating Lead Authors: Gabriele C. Hegerl (USA. Nicholls, J.E. Penner and P.A. Stott, 2007: Under- standing and Attributing Climate Change. In: Climate of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M

Box, Jason E.

500

International Finance and Climate Change  

E-Print Network [OSTI]

International Finance and Climate Change Thursday, October 17, 2013 Breakfast ­ 8:30 a Principal Climate Change Specialist, Climate Business Group at International Finance Corporation, World Bank Group Vladimir Stenek Senior Climate Change Specialist, Climate Business Department of the International

Zhang, Junshan