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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

Field Testing of Low-Cost Bio-Based Phase Change Material  

SciTech Connect (OSTI)

A test wall built with phase change material (PCM)-enhanced loose-fill cavity insulation was monitored for a period of about a year in the warm-humid climate of Charleston, South Carolina. The test wall was divided into various sections, one of which contained only loose-fill insulation and served as a control for comparing and evaluating the wall sections with the PCM-enhanced insulation. This report summarizes the findings of the field test.

Biswas, Kaushik [ORNL; Childs, Phillip W [ORNL; Atchley, Jerald Allen [ORNL

2013-03-01T23:59:59.000Z

2

Development of a Bio-Based, Inexpensive, Noncorrosive, Nonflammable...  

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

Development of a Bio-Based, Inexpensive, Noncorrosive, Nonflammable Phenolic Foam for Building Insulation Development of a Bio-Based, Inexpensive, Noncorrosive, Nonflammable...

3

Phase change compositions  

DOE Patents [OSTI]

Compositions containing crystalline, straight chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.

Salyer, Ival O. (Dayton, OH)

1989-01-01T23:59:59.000Z

4

Phase change compositions  

SciTech Connect (OSTI)

Compositions containing crystalline, long chain, alkyl hydrocarbons as phase change materials including cementitious compositions containing the alkyl hydrocarbons neat or in pellets or granules formed by incorporating the alkyl hydrocarbons in polymers or rubbers; and polymeric or elastomeric compositions containing alkyl hydrocarbons.

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

1986-01-01T23:59:59.000Z

5

Phase Change | Jefferson Lab  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006 TheSteven AshbyDepartmentPersonnelAdams5 Entire .1226Phase Change

6

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

7

Bio-based Greases: Environmental concerns  

E-Print Network [OSTI]

are causing a resurgence for these plant-based lubricants. 36 • MAY 2014 TRIBOLOGY & LUBRICATION TECHNOLOGY WWW.STLE.ORGAFTER A 150-YEAR HIATUS, lubricating greases made from agricultural products are making a comeback. For some 4,000 years, animal fats, olive oil and other biobased materials kept wheels and gears moving along smoothly. The shift toward petroleum-based lubricants came about only in the latter half of the 19th century. 1 Now uncertainties in petroleum prices and supply sources, coupled with an emerging awareness of environmental factors, are turning a small segment of the market back to lubricants made from renewable resources—mainly plants. Back to the Future Can bio-based lubricants compete in a world of high-capacity generators, jet aircraft engines and 18-wheel trucks? This question is particularly challenging when the lubricants are greases, which require thickeners and additives and must perform under heavy loads and in hostile environments. WHY BIO?

unknown authors

8

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

9

MHK Technologies/bioBase | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision hasInformation Earth's Heat JumpIncMAKGalway Bay IEOWCCatcher.pngWavemill < MHKYOG <bioBase

10

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,...

11

Building America Webinar: Opportunities to Apply Phase Change...  

Energy Savers [EERE]

Opportunities to Apply Phase Change Materials to Building Enclosures Building America Webinar: Opportunities to Apply Phase Change Materials to Building Enclosures This webinar,...

12

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

13

Polyolefin composites containing a phase change material  

DOE Patents [OSTI]

A composite useful in thermal energy storage, said composite being formed of a polyolefin matrix having a phase change material such as a crystalline alkyl hydrocarbon incorporated therein, said polyolefin being thermally form stable; the composite is useful in forming pellets, sheets or fibers having thermal energy storage characteristics; methods for forming the composite are also disclosed.

Salyer, Ival O. (Dayton, OH)

1991-01-01T23:59:59.000Z

14

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

15

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

16

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.

Salyer, Ival O. (Dayton, OH)

1995-01-01T23:59:59.000Z

17

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

18

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

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.

Salyer, Ival O. (Dayton, OH)

1994-01-01T23:59:59.000Z

20

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

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

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

22

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

23

Dry powder mixes comprising phase change materials  

SciTech Connect (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.-3 to about 7.times.10.sup.-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.

Salyer, Ival O. (Dayton, OH)

1992-01-01T23:59:59.000Z

24

Dry powder mixes comprising phase change materials  

SciTech Connect (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.

Salyer, Ival O. (Dayton, OH)

1994-01-01T23:59:59.000Z

25

Dry powder mixes comprising phase change materials  

SciTech Connect (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.-3 to about 7.times.10.sup.-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, garmets, 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.

Salyer, Ival O. (Dayton, OH)

1993-01-01T23:59:59.000Z

26

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.-3 to about 7.times.10.sup.-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.

Salyer, Ival O. (Dayton, OH)

1993-01-01T23:59:59.000Z

27

Mechanics of Metals with Phase Changes  

SciTech Connect (OSTI)

New experimental data is presented on some exotic metals that exhibit phase changes at cryogenic temperatures. The types of phase changes that were detected in the specific heat data range from martensitic (diffusion less) transitions to superconducting transitions. In addition, the charge density wave (CDW) state in uranium metal was detected in the specific heat. Specific-heat measurements were made in zero-magnetic field using an apparatus capable of obtaining temperatures as low as 0.4 K. Calibration performed on this apparatus, using a single-crystal copper sample, show its accuracy to be 0.50%, while the resolution was better than 0.1%. Our measurements demonstrate that similar high precision and accurate specific-heat measurements can be obtained on milligram-scale samples. In Chapters 2 and 3, specific-heat measurements are presented for the B2 (CsCl structure) alloy AuZn and for {alpha}-uranium (orthorhombic symmetry). The AuZn alloy exhibits a continuous transition at 64.75 K and an entropy of transition of ({Delta}S{sub tr}) 2.02 J K{sup {minus}1} mol{sup {minus}1}. Calculation of the Debye temperature, by extrapolating of the high temperature phase elastic constants to T = 0 K yields a value of 207 K ({+-}2 K), in favorable agreement with the calorimetric value of 219 K ({+-}0.50 K), despite the intervening martensitic transition. Reported results for single-crystal {alpha}-U show a low-temperature limiting {Theta}{sub D} of 256 K ({+-}0.50 K) and four low-temperature anomalies: a superconducting transition below 1 K, an electronic transition at 22 K, and two anomalies at 38 K and at 42 K indicative of the CDW state. In order to continue the study of the actinide series of elements, a program was initiated to first purify and then grow single crystals of plutonium. Accordingly, the focus of Chapters 4 through 6 will be a description of plutonium sample preparation. In this program plutonium metal was purified via zone refining, using a levitated molten zone to minimize the introduction of impurities. Several impurities were reduced to levels below that of instrument detection limits. Results indicate that six sequential zone refining passes are required to obtain metal with 130 ppm total impurities (excluding N, O, F, Cl, and Br). Small single crystals with a volume of 1 mm{sup 3} were grown of {delta}-plutonium by a strain-anneal technique. The values obtained for the critical strain in the strain-anneal experiments are in favorable agreement with values obtained by other researches using loading methods other than biaxial loading.

Lashley, J.C.

2001-01-01T23:59:59.000Z

28

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

29

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

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

Phase Changing Material Modular Thermal Energy Storage System Acciona logo Acciona Solar, under the Thermal Storage FOA, plans to design and validate a prototype and...

30

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

E-Print Network [OSTI]

Proceedings of the 8th Pacific Rim Bio-Based Composites Symposium 200 The Application of 3-D X-Ray Tomography with Finite Element Analysis for Engineering Properties of Strand-Based Composites Qinglin Wu1 Strand-based composites are formed by arranging wood strands in a mat and bonding them together

31

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 a hybrid of solar and bio-power and also solve the most perplexing problem facing solar energy: energy compounds, and oxygen is released as a byproduct," Lovley explains. Solar energy powers the microbes

Lovley, Derek

32

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

33

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

34

PHASE CHANGE MATERIALS IN FLOOR TILES FOR THERMAL ENERGY STORAGE  

SciTech Connect (OSTI)

Passive solar systems integrated into residential structures significantly reduce heating energy consumption. Taking advantage of latent heat storage has further increased energy savings. This is accomplished by the incorporation of phase change materials into building materials used in passive applications. Trombe walls, ceilings and floors can all be enhanced with phase change materials. Increasing the thermal storage of floor tile by the addition of encapsulated paraffin wax is the proposed topic of research. Latent heat storage of a phase change material (PCM) is obtained during a change in phase. Typical materials use the latent heat released when the material changes from a liquid to a solid. Paraffin wax and salt hydrates are examples of such materials. Other PCMs that have been recently investigated undergo a phase transition from one solid form to another. During this process they will release heat. These are known as solid-state phase change materials. All have large latent heats, which makes them ideal for passive solar applications. Easy incorporation into various building materials is must for these materials. This proposal will address the advantages and disadvantages of using these materials in floor tile. Prototype tile will be made from a mixture of quartz, binder and phase change material. The thermal and structural properties of the prototype tiles will be tested fully. It is expected that with the addition of the phase change material the structural properties will be compromised to some extent. The ratio of phase change material in the tile will have to be varied to determine the best mixture to provide significant thermal storage, while maintaining structural properties that meet the industry standards for floor tile.

Douglas C. Hittle

2002-10-01T23:59:59.000Z

35

Phase Change Material Tower | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15, 2010Energy6 Frontera STAT.Paul L.3 AgencyEnergyB.PetraPhase

36

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

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

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...

37

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

38

Vibration damping and heat transfer using material phase changes  

DOE Patents [OSTI]

A method and apparatus wherein phase changes in a material can dampen vibrational energy, dampen noise and facilitate heat transfer. One embodiment includes a method for damping vibrational energy in a body. The method comprises attaching a material to the body, wherein the material comprises a substrate, a shape memory alloy layer, and a plurality of temperature change elements. The method further comprises sensing vibrations in the body. In addition, the method comprises indicating to at least a portion of the temperature change elements to provide a temperature change in the shape memory alloy layer, wherein the temperature change is sufficient to provide a phase change in at least a portion of the shape memory alloy layer, and further wherein the phase change consumes a sufficient amount of kinetic energy to dampen at least a portion of the vibrational energy in the body. In other embodiments, the shape memory alloy layer is a thin film. Additional embodiments include a sensor connected to the material.

Kloucek, Petr (Houston, TX); Reynolds, Daniel R. (Oakland, CA)

2009-03-24T23:59:59.000Z

39

Method for preparing polyolefin composites containing a phase change material  

DOE Patents [OSTI]

A composite useful in thermal energy storage, said composite being formed of a polyolefin matrix having a phase change material such as a crystalline alkyl hydrocarbon incorporated therein. The composite is useful in forming pellets, sheets or fibers having thermal energy storage characteristics; methods for forming the composite are also disclosed.

Salyer, Ival O. (Dayton, OH)

1990-01-01T23:59:59.000Z

40

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

E-Print Network [OSTI]

UNIVERSITY OF CALIFORNIA RIVERSIDE Phase Change Materials for Thermal Energy Storage in Concentrated Solar

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

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

A new nonlinear solution method for phase-change problems  

SciTech Connect (OSTI)

Numerical simulation is playing an increasingly important role in support of industrial casting processes. The goal of simulations is to capture accurately the solidification dynamics in pure materials, and in multicomponent alloys. To achieve this goal a numerical algorithm must evolve accurately the latent heat in an isothermal solidification process, and it must also couple accurately the temperature and concentration fields in the nonisothermal solidification of multicomponent alloys. The authors present a new nonlinear algorithm for the efficient and accurate solution of isothermal and nonisothermal phase-change problems. The method correctly evolves latent heat release in isothermal and nonisothermal phase change, and more important, it provides a means for the efficient and accurate coupling between temperature and concentration fields in multispecies nonisothermal phase change. Newton-like superlinear convergence is achieved in the global nonlinear iteration, without the complexity of forming or inverting the Jacobian matrix. This Jacobian-free method is a combination of an outer Newton-based iteration and an inner conjugate gradient-like (krylov) iteration. The effects of the Jacobian are probed only through approximate matrix-vector products required in the conjugate gradient-like iteration.

Knoll, D.A.; Kothe, D.B.; Lally, B. [Los Alamos National Lab., NM (United States)

1999-06-01T23:59:59.000Z

42

Phase-Changing Ionic Liquids: CO2 Capture with Ionic Liquids Involving Phase Change  

SciTech Connect (OSTI)

IMPACCT Project: Notre Dame is developing a new CO2 capture process that uses special ionic liquids (ILs) to remove CO2 from the gas exhaust of coal-fired power plants. ILs are salts that are normally liquid at room temperature, but Notre Dame has discovered a new class of ILs that are solid at room temperature and change to liquid when they bind to CO2. Upon heating, the CO2 is released for storage, and the ILs re-solidify and donate some of the heat generated in the process to facilitate further CO2 release. These new ILs can reduce the energy required to capture CO2 from the exhaust stream of a coal-fired power plant when compared to state-ofthe- art technology.

None

2010-07-01T23:59:59.000Z

43

New phase-change thermal energy storage materials for buildings  

SciTech Connect (OSTI)

A new class of phase-change thermal energy storage materials is under development at SERI. These materials are unusual in two ways. They reversibly absorb large amounts of heat during a solid-state, crystal transformation more than 70/sup 0/C below their melting temperatures, and their solid-state transformation temperatures may be adjusted over a range from 7/sup 0/C to 188/sup 0/C by varying the ratios of binary mixtures of the components. Because these storage materials remain solid throughout the range of their service temperatures, unique opportunities exist for incorporating them into building materials. Composites have been made with ordinary, porous construction materials such as wood, gypsum board, and lightweight concrete as the matrix and with the solid-state phase change materials (SS PCM) filling the void space. The thermal storage capacities of such composites are thereby increased by more than 100% without changing the basic nature and workability of the matrix, construction material. Parametric analyses have been conducted to determine what combination of properties would be optimum for certain solar and energy conserving building applications including Trombe wall, direct gain, and distributed cool storage (combined with night ventilation).

Benson, D.K.; Christensen, C.B.; Burrows, R.W.

1985-10-01T23:59:59.000Z

44

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

45

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

46

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

E-Print Network [OSTI]

This paper presents results of side-by-side experimental testing of a technology, referred to as Phase Change Frame Wall (PCFW), whose primary purpose is to increase building thermal mass by the application of phase change materials (PCMs...

Medina, M.; Stewart, R.

47

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

48

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...

49

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

50

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

51

NGNP Process Heat Utilization: Liquid Metal Phase Change Heat Exchanger  

SciTech Connect (OSTI)

One key long-standing issue that must be overcome to fully realize the successful growth of nuclear power is to determine other benefits of nuclear energy apart from meeting the electricity demands. The Next Generation Nuclear Plant (NGNP) will most likely be producing electricity and heat for the production of hydrogen and/or oil retrieval from oil sands and oil shale to help in our national pursuit of energy independence. For nuclear process heat to be utilized, intermediate heat exchange is required to transfer heat from the NGNP to the hydrogen plant or oil recovery field in the most efficient way possible. Development of nuclear reactor - process heat technology has intensified the interest in liquid metals as heat transfer media because of their ideal transport properties. Liquid metal heat exchangers are not new in practical applications. An important rational for considering liquid metals is the potential convective heat transfer is among the highest known. Thus explains the interest in liquid metals as coolant for intermediate heat exchange from NGNP. For process heat it is desired that, intermediate heat exchangers (IHX) transfer heat from the NGNP in the most efficient way possible. The production of electric power at higher efficiency via the Brayton Cycle, and hydrogen production, requires both heat at higher temperatures and high effectiveness compact heat exchangers to transfer heat to either the power or process cycle. Compact heat exchangers maximize the heat transfer surface area per volume of heat exchanger; this has the benefit of reducing heat exchanger size and heat losses. High temperature IHX design requirements are governed in part by the allowable temperature drop between the outlet and inlet of the NGNP. In order to improve the characteristics of heat transfer, liquid metal phase change heat exchangers may be more effective and efficient. This paper explores the overall heat transfer characteristics and pressure drop of the phase change heat exchanger with Na as the heat exchanger coolant. In order to design a very efficient and effective heat exchanger one must optimize the design such that we have a high heat transfer and a lower pressure drop, but there is always a trade-off between them. Based on NGNP operational parameters, a heat exchanger analysis with the sodium phase change will be presented to show that the heat exchanger has the potential for highly effective heat transfer, within a small volume at reasonable cost.

Piyush Sabharwall; Mike Patterson; Vivek Utgikar; Fred Gunnerson

2008-09-01T23:59:59.000Z

52

Innovative Phase Change Thermal Energy Storage Solution for Baseload Power Phase 1 Final Report  

SciTech Connect (OSTI)

The primary purpose of this project is to develop and validate an innovative, scalable phase change salt thermal energy storage (TES) system that can interface with Infinia’s family of free-piston Stirling engines (FPSE). This TES technology is also appropriate for Rankine and Brayton power converters. Solar TES systems based on latent heat of fusion rather than molten salt temperature differences, have many advantages that include up to an order of magnitude higher energy storage density, much higher temperature operation, and elimination of pumped loops for most of Infinia’s design options. DOE has funded four different concepts for solar phase change TES, including one other Infinia awarded project using heat pipes to transfer heat to and from the salt. The unique innovation in this project is an integrated TES/pool boiler heat transfer system that is the simplest approach identified to date and arguably has the best potential for minimizing the levelized cost of energy (LCOE). The Phase 1 objectives are to design, build and test a 1-hour TES proof-of-concept lab demonstrator integrated with an Infinia 3 kW Stirling engine, and to conduct a preliminary design of a 12-hour TES on-sun prototype.

Qiu, Songgang

2013-05-15T23:59:59.000Z

53

Small Scale SOFC Demonstration Using Bio-Based and Fossil Fuels  

SciTech Connect (OSTI)

Technology Management, Inc. (TMI) of Cleveland, Ohio, has completed the project entitled â??Small Scale SOFC Demonstration using Bio-based and Fossil Fuels.â? Under this program, two 1-kW systems were engineered as technology demonstrators of an advanced technology that can operate on either traditional hydrocarbon fuels or renewable biofuels. The systems were demonstrated at Patterson's Fruit Farm of Chesterland, OH and were open to the public during the first quarter of 2012. As a result of the demonstration, TMI received quantitative feedback on operation of the systems as well as qualitative assessments from customers. Based on the test results, TMI believes that > 30% net electrical efficiency at 1 kW on both traditional and renewable fuels with a reasonable entry price is obtainable. The demonstration and analysis provide the confidence that a 1 kW entry-level system offers a viable value proposition, but additional modifications are warranted to reduce sound and increase reliability before full commercial acceptance.

Michael Petrik; Robert Ruhl

2012-03-31T23:59:59.000Z

54

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

55

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

56

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

57

Modeling for Free Surface Flow with Phase Change  

SciTech Connect (OSTI)

The development of predictive capability for free surface flow with phase change is essential to evaluate liquid wall protection schemes for various fusion chambers in IFE and MFE. This paper presents a numerical methodology for free surface flow with heat and mass transfer to help resolve feasibility issues encountered in the aforementioned fusion engineering fields. The numerical methodology is conducted within the framework of the incompressible flow with the heat and mass transfer model. We present a new second-order projection method, in conjunction with Approximate-Factorization techniques (AF method) for incompressible Navier-Stokes equations. The level set method was used to capture the free surface of the flow and the deformation of the droplets accurately. This numerical investigation identifies the physics characterizing transient heat and mass transfer of the droplet and the free surface flow. The preliminary results show that the numerical methodology is successful in modeling the free surface with heat and mass transfer, though some severe deformation such as breaking and merging occurs. The versatility of the numerical methodology shows that the work can easily handle complex physical conditions in fusion science and engineering.

Luo Xiaoyong; Ni Mingjiu; Ying, Alice; Abdou, M. [University of California, Los Angeles (United States)

2005-05-15T23:59:59.000Z

58

advanced phase change: Topics by E-print Network  

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

Climate change will affect the ability of developing counties to achieve their poverty reduction and sustainable development strategies. Projections of climate change point to...

59

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

60

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

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

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

62

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

63

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

64

Study of Laminar Flow Forced Convection Heat Transfer Behavior of a Phase Change Material Fluid  

E-Print Network [OSTI]

at the entrance of the tube. Results were also obtained for the phase change process under hydro dynamically and thermally fully developed conditions. In case of a smooth circular tube with phase change material (PCM) fluid, results of Nusselt number were obtained...

Ravi, Gurunarayana

2010-01-14T23:59:59.000Z

65

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

66

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

E-Print Network [OSTI]

with graphene. Incorporation of graphene increases thermal conductivity of phase change materials. Graphene that common PCMs are characterized by very low thermal conductivity, K, with typical values in the range of 0Graphene-enhanced hybrid phase change materials for thermal management of Li-ion batteries

67

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

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

changes into the stable red allotrope. Apart from the heat... in the gas phase in the boiler (see Table I). In addition to the fOllllation of mercury (II) chloride, other......

68

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

69

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

70

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

E-Print Network [OSTI]

technology and the thermal characteristic- analyzing method commonly applied in building envelopes, proposes future research methods for phase change material wall rooms, and lays a solid foundation for the research of the heat transfer mechanism and thermal...

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

2006-01-01T23:59:59.000Z

71

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

72

Micro- and Nanoscale Measurement Methods for Phase Change Heat Transfer on Planar and Structured Surfaces  

E-Print Network [OSTI]

In this opinion piece, we discuss recent advances in experimental methods for characterizing phase change heat transfer. We begin with a survey of techniques for high-resolution measurements of temperature and heat flux ...

Buongiorno, Jacopo

73

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

74

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

75

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

76

Heat transfer in porous media with fluid phase changes  

SciTech Connect (OSTI)

A one-dimensional experimental apparatus was built to study the heat pipe phenomenon. Basically, it consists of a 25 cm long, 2.5 cm I.D. Lexane tube packed with Ottawa sand. The two ends of the tube were subjected to different tempratures, i.e., one above the boiling temperature and the other below. The tube was well insulated so that a uniform one-dimensional heat flux could pass through the sand pack. Presence of the heat pipe phenomenon was confirmed by the temperature and saturation profiles of the sand pack at the final steady state condition. A one-dimensional steady state theory to describe the experiment has been developed which shows the functional dependence of the heat pipe phenomenon on liquid saturation gradient, capillary pressure, permeability, fluid viscosity, latent heat, heat flux and gravity. Influence of the heat pipe phenomenon on wellbore heat losses was studied by use of a two-phase two-dimensional cylindrical coordinate computer model.

Su, H.J.

1981-06-01T23:59:59.000Z

77

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.

78

Development of Micro-Encapsulated Phase Change Materials and W. Brownrigg  

E-Print Network [OSTI]

, thus creating a fluid of very high specific heat capacity over a narrow temperature range to demonstrate heat capacity of the LHS (eqtn 1). Here, a PCM is subject to heating from Tinitial to Tfinal temperature change to the TES. For practical purposes, the phase change between liquid and gas is not often

79

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

80

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"

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

Investigation of water to ice phase change in porous media by ultrasonic and dielectric measurements  

E-Print Network [OSTI]

Investigation of water to ice phase change in porous media by ultrasonic and dielectric objective of this paper is to study the evolution of the ice content of porous media submitted to sub upon concrete structures is a source of main concern in cold climates (Pigeon 1984; Dash et al. 1995

Paris-Sud XI, Université de

82

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

E-Print Network [OSTI]

will be explored in this project. Combinatorial materials exploration will be used to fabricate samples where filmMaterials World Network: Phase change materials for nanoelectronics: A combinatorial approach, III, Micron Technology Inc., Boise, ID Toyohiro Chikyow, National Institute for Materials Science

Olmstead, Marjorie

83

Ultrafast Dynamics and Phase Changes in Solids Excited by Femtosecond Laser Pulses  

E-Print Network [OSTI]

Ultrafast Dynamics and Phase Changes in Solids Excited by Femtosecond Laser Pulses A thesis pulse excites 1­20% of the valence electrons. We developed a broadband pump-probe technique to measure femtoseconds. The dielectric function provides more information than ever before on the ultrafast electronic

Mazur, Eric

84

Energy Efficient Phase Change Memory Based Main Memory for Future High Performance Systems  

E-Print Network [OSTI]

hybrid system using a commodity DRAM cache. Keywords-Memory Controller, DRAM, PCM, Energy I. INTRODUCTIONEnergy Efficient Phase Change Memory Based Main Memory for Future High Performance Systems Abstract system of similar storage size. Our proposed system is highly energy efficient and provides 35

Conte, Thomas M.

85

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

86

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

87

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

88

The Tellurophosphate K4P8Te4: Phase-Change Properties, Exfoliation, Photoluminescence in Solution and Nanospheres  

E-Print Network [OSTI]

The Tellurophosphate K4P8Te4: Phase-Change Properties, Exfoliation, Photoluminescence in Solution- state NMR spectroscopy, electrospray ionization mass spectrometry, and PDF analysis indicate exfoliation

Weliky, David

89

The effect of Ta interface on the crystallization of amorphous phase change material thin films  

SciTech Connect (OSTI)

The crystallization of amorphous GeTe and Ge{sub 2}Sb{sub 2}Te{sub 5} phase change material films, with thickness between 10 and 100?nm, sandwiched between either Ta or SiO{sub 2} layers, was investigated by optical reflectivity. Ta cladding layers were found to increase the crystallization temperature, even for films as thick as 100?nm. X-Ray diffraction investigations of crystallized GeTe films showed a very weak texture in Ta cladded films, in contrast with the strong texture observed for SiO{sub 2} cladding layers. This study shows that crystallization mechanism of phase change materials can be highly impacted by interface effects, even for relatively thick films.

Ghezzi, G. E. [CEA-LETI, MINATEC campus, 17 rue des Martyrs, F 38054 Grenoble (France); LMGP, CNRS Grenoble-INP, MINATEC, 3 parvis Louis Néel, F 38016 Grenoble (France); Noé, P., E-mail: pierre.noe@cea.fr; Marra, M.; Sabbione, C.; Fillot, F.; Bernier, N.; Ferrand, J.; Maîtrejean, S. [CEA-LETI, MINATEC campus, 17 rue des Martyrs, F 38054 Grenoble (France); Hippert, F. [LMGP, CNRS Grenoble-INP, MINATEC, 3 parvis Louis Néel, F 38016 Grenoble (France); LNCMI (CNRS, UJF, UPS, INSA), 25 rue des Martyrs, F 38042 Grenoble Cedex 9 (France)

2014-06-02T23:59:59.000Z

90

Ultrafast terahertz-induced response of GeSbTe phase-change materials  

SciTech Connect (OSTI)

The time-resolved ultrafast electric field-driven response of crystalline and amorphous GeSbTe films has been measured all-optically, pumping with single-cycle terahertz pulses as a means of biasing phase-change materials on a sub-picosecond time-scale. Utilizing the near-band-gap transmission as a probe of the electronic and structural response below the switching threshold, we observe a field-induced heating of the carrier system and resolve the picosecond-time-scale energy relaxation processes and their dependence on the sample annealing condition in the crystalline phase. In the amorphous phase, an instantaneous electroabsorption response is observed, quadratic in the terahertz field, followed by field-driven lattice heating, with Ohmic behavior up to 200?kV/cm.

Shu, Michael J. [Department of Applied Physics, Stanford University, Stanford, California 94305 (United States); Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); Zalden, Peter [Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); Chen, Frank [Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Weems, Ben [Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 (United States); Chatzakis, Ioannis [Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); Xiong, Feng; Jeyasingh, Rakesh; Pop, Eric; Philip Wong, H.-S. [Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Hoffmann, Matthias C. [SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); Wuttig, Matthias [I. Physikalisches Institut, RWTH Aachen University, 52056 Aachen (Germany); JARA–Fundamentals of Information Technology, RWTH Aachen University, 52056 Aachen (Germany); Lindenberg, Aaron M., E-mail: aaronl@stanford.edu [Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025 (United States); Department of Materials Science and Engineering, Stanford University, Stanford, California 94305 (United States)

2014-06-23T23:59:59.000Z

91

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

92

Experimental and Simulation Approaches for Optimizing the Thermal Performance of Building Enclosures Containing Phase Change Materials  

E-Print Network [OSTI]

Experimental and Simulation Approaches for Optimizing the Thermal Performance of Building Enclosures Containing Phase Change Materials By Kyoung Ok Lee M.S., The University of Kansas, Lawrence, Kansas, 2013 M.Eng., Chung-Ang University... those for buildings (EIA, 2013). In the U.S., buildings consume about 40% of total energy used in the country (EIA, 2012) and about 40% of greenhouse gas emissions are attributed to building energy consumption (EIA, 2011). Space cooling and heating...

Lee, Kyoung Ok

2014-05-31T23:59:59.000Z

93

Advanced phase change materials and systems for solar passive heating and cooling of residential buildings  

SciTech Connect (OSTI)

During the last three years under the sponsorship of the DOE Solar Passive Division, the University of Dayton Research Institute (UDRI) has investigated four phase change material (PCM) systems for utility in thermal energy storage for solar passive heating and cooling applications. From this research on the basis of cost, performance, containment, and environmental acceptability, we have selected as our current and most promising series of candidate phase change materials, C-15 to C-24 linear crystalline alkyl hydrocarbons. The major part of the research during this contract period was directed toward the following three objectives. Find, test, and develop low-cost effective phase change materials (PCM) that melt and freeze sharply in the comfort temperature range of 73--77{degree}F for use in solar passive heating and cooling of buildings. Define practical materials and processes for fire retarding plasterboard/PCM building products. Develop cost-effective methods for incorporating PCM into building construction materials (concrete, plasterboard, etc.) which will lead to the commercial manufacture and sale of PCM-containing products resulting in significant energy conservation.

Salyer, I.O.; Sircar, A.K.; Dantiki, S.

1988-01-01T23:59:59.000Z

94

High-Temperature Phase Change Materials (PCM) Candidates for Thermal Energy Storage (TES) Applications  

SciTech Connect (OSTI)

It is clearly understood that lower overall costs are a key factor to make renewable energy technologies competitive with traditional energy sources. Energy storage technology is one path to increase the value and reduce the cost of all renewable energy supplies. Concentrating solar power (CSP) technologies have the ability to dispatch electrical output to match peak demand periods by employing thermal energy storage (TES). Energy storage technologies require efficient materials with high energy density. Latent heat TES systems using phase change material (PCM) are useful because of their ability to charge and discharge a large amount of heat from a small mass at constant temperature during a phase transformation like melting-solidification. PCM technology relies on the energy absorption/liberation of the latent heat during a physical transformation. The main objective of this report is to provide an assessment of molten salts and metallic alloys proposed as candidate PCMs for TES applications, particularly in solar parabolic trough electrical power plants at a temperature range from 300..deg..C to 500..deg.. C. The physical properties most relevant for PCMs service were reviewed from the candidate selection list. Some of the PCM candidates were characterized for: chemical stability with some container materials; phase change transformation temperatures; and latent heats.

Gomez, J. C.

2011-09-01T23:59:59.000Z

95

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

96

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

97

An ultrafast phase-change logic device driven by melting processes  

E-Print Network [OSTI]

/device structures are developed with a higher number of resistance levels and resistance-level combinations (11,14). 6 The GST cells have been shown to exhibit ultra-fast Boolean algebraic operations via boosting the energy delivered by electrical-pulse... 1 Title An ultrafast phase-change logic device driven by melting processes Authors D. Loke,1,2,3 J. M. Skelton,1,4 W. J. Wang,5 T. H. Lee,1 R. Zhao,2 T. C. Chong,2,* S. R. Elliott,1,* Affiliations 1Department of Chemistry, University...

Loke, D.; Skelton, J. M.; Wang, W. J.; Lee, T. H.; Zhao, R.; Chong, T. C.; Elliott, S. R.

2014-09-02T23:59:59.000Z

98

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

99

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

100

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

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

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

102

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

103

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

E-Print Network [OSTI]

The application of phase change energy storage has become an academic focus in building energy conservation. This paper considers day and night climate conditions and the governmental regulation of price of electricity in testing and analyzing...

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

2006-01-01T23:59:59.000Z

104

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

105

Potential industrial applications for composite phase-change materials as thermal energy storage media  

SciTech Connect (OSTI)

Considerable effort has been spent by the US Department of Energy and its contractors over the last few years to develop composite phase-change materials (CPCMs) for thermal energy storage (TES). This patented TES medium consists of a phase-change material (typically a salt or metal alloy) that is retained within the porous structure of a supporting material (typically a ceramic). The objectives of this study were to (1) introduce CPCMs to industries that may not otherwise be aware of them, (2) identify potentially attractive applications for CPCM in industry, (3) determine technical requirements that will affect the design of CPCM's for specific applications, and (4) generate interest among industrial firms for employing CPCM TES in their processes. The approach in this study was to examine a wide variety of industries using a series of screens to select those industries that would be most likely to adopt CPCM TES in their processes. The screens used in this study were process temperature, presence of time-varying energy flows, energy intensity of the industry, and economic growth prospects over the next 5 years. After identifying industries that passed all of the screens, representatives of each industry were interviewed by telephone to introduce them to CPCM TES, assess technical requirements for CPCM TES in their industry, and determine their interest in pursuing applications for CPCM TES. 11 refs., 4 tabs.

Spanner, G.E.; Wilfert, G.L.

1989-07-01T23:59:59.000Z

106

High-heat-flux removal by phase-change fluid and particulate flow  

SciTech Connect (OSTI)

A new concept based on particulate flow in which either or both the particulates and the fluid could undergo phase changes is proposed. The presence of particulates provides not only a mechanism for additional heat removal through phase change but also the potential for increasing the rate of heat transfer by enhancing convection through surface region/bulk [open quotes]mixing[close quotes], by enhancing radiation, particularly for high-temperature cases; and for the case of multiphase fluid, by enhancing the boiling process. One particularly interesting coolant system based on this concept is [open quotes]subcooled boiling water-ice particulate[close quotes] flow. A preliminary analysis of this coolant system is presented, the results of which indicate that such a coolant system is better applied for cooling of relatively small surface areas with high local heat fluxes, where a conventional cooling system would come short of providing the required heat removal at acceptable coolant pressure levels. 14 refs., 8 figs.

Gorbis, Z.R.; Raffray, A.R.; Abdou, M.A. (Univ. of California, Los Angeles (United States))

1993-07-01T23:59:59.000Z

107

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

108

Transient moisture migration and phase change front propagation in porous media  

SciTech Connect (OSTI)

The process of transient moisture migration in a semi-infinite slab of porous concrete being heated at one side has been analyzed. The model solves the heat and mass transfer equations considering water and air migration in the concrete, including evaporation and recondensation effects. The domain is subdivided into a dry region and a wet region, with the phase-change-front motion being modeled via mass and energy conservation at the front. Approximate solutions are obtained by use of a similarity transformation and numerical integration of the resulting ordinary differential equations. Typical results and parametric evaluations are given for the cases of an impermeable outer surface as well as an outer surface exposed to ambient pressure.

Shiina, Y.; Kroeger, P.G.

1984-01-01T23:59:59.000Z

109

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

110

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

111

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

112

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

113

2006/07 Field Testing of Cellulose Fiber Insulation Enhanced with Phase Change Material  

SciTech Connect (OSTI)

Most recent improvements in building envelope technologies suggest that in the near future, residences will be routinely constructed to operate with very low heating and cooling loads. In that light, the application of novel building materials containing active thermal components (e.g., phase change materials [PCMs,] sub-venting, radiant barriers, and integrated hydronic systems) is like a final step in achieving relatively significant heating and cooling energy savings from technological improvements in the building envelope. It is expected that optimized building envelope designs using PCMs for energy storage can effectively bring notable savings in energy consumption and reductions in peak hour power loads. During 2006/07, a research team at Oak Ridge National Laboratory (ORNL) performed a series of laboratory and field tests of several wall and roof assemblies using PCM-enhanced cellulose insulation. This report summarizes the test results from the perspective of energy performance. The ORNL team is working on both inorganic and organic PCMs; this report discusses only paraffinic PCMs. A limited economical analysis also is presented. PCMs have been tested as a thermal mass component in buildings for at least 40 years. Most of the research studies found that PCMs enhanced building energy performance. In the case of the application of organic PCMs, problems such as high initial cost and PCM leaking (surface sweating) have hampered widespread adoption. Paraffinic hydrocarbon PCMs generally performed well, with the exception that they increased the flammability of the building envelope.

Kosny, Jan [ORNL; Yarbrough, David W [ORNL; Miller, William A [ORNL; Petrie, Thomas [ORNL; Childs, Phillip W [ORNL; Syed, Azam M [ORNL

2008-12-01T23:59:59.000Z

114

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...

115

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

116

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

117

Exploring Phase Change Memory and 3D Die-Stacking for Power/Thermal Friendly, Fast and Durable Memory Architectures  

E-Print Network [OSTI]

Exploring Phase Change Memory and 3D Die-Stacking for Power/Thermal Friendly, Fast and Durable) as a promising candidate to achieve scalable, low power and thermal friendly memory system architecture leakages and retention time. DRAM-based main memory is also consuming an increasing proportion of the power

Kavi, Krishna

118

Numerical Study of the Influence of the Convective Heat Transfer on the Dynamical Behaviour of a Phase Change Material Wall  

E-Print Network [OSTI]

. It is then a potential method for reducing energy consumption in passively designed buildings. This tendency is confirmed, the use of Phase Change Materials (PCM) allows the storage/release of energy from solar radiation and internal loads. The application of such materials for lightweight construction (e.g., a wood house) makes

119

Submission of manuscript to Energy and Buildings A thermal model for Phase Change Materials in a building roof for a  

E-Print Network [OSTI]

Submission of manuscript to Energy and Buildings A thermal model for Phase Change Materials: Stéphane GUICHARD Physics and Mathematical Engineering Laboratory for Energy and Environment (PIMENT in "Energy and Buildings 70 (2014) http://www.sciencedirect.com/science/article/pii/ S0378778813007962" DOI

Paris-Sud XI, Université de

120

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

E-Print Network [OSTI]

STORAGE FOR CONCENTRATING SOLAR POWER PLANTS,” Eurosun 2010,COST REDUCTION STUDY FOR SOLAR THERMAL POWER PLANTS, Ottawa,heat transfer in solar thermal power plants utilizing phase

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

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

Mathematical Models and Numerical Simulations of phase change in Lagrangian and Eulerian descriptions  

E-Print Network [OSTI]

. . . . . . . . . . 139 xvi ahfhfhg Nomenclature ? Density c Specific Heat cp Specific Heat cs Specific Heat in Solid Phase cps Specific Heat in Solid Phase cl Specific Heat in Liquid Phase cpl Specific Heat in Liquid Phase k Thermal Conductivity ks Thermal Conductivity... the movement of the front during evo- lution. In most applications of interest, simulation of the formation of the transition region i.e. solid-liquid interface is essential as it may not be possible to know its location a priori. 6 These limitations have...

Quiros Fonseca, Luis Alonso

2012-12-31T23:59:59.000Z

122

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

E-Print Network [OSTI]

Review on Sustainable thermal Energy Storage Technologies,D. , 2009, “Review on Thermal Energy Storage with PhaseW. , 2002, “Survey of Thermal Energy Storage for Parabolic

Coso, Dusan

2013-01-01T23:59:59.000Z

123

Atomic scale insight into the amorphous structure of Cu doped GeTe phase-change material  

SciTech Connect (OSTI)

GeTe shows promising application as a recording material for phase-change nonvolatile memory due to its fast crystallization speed and extraordinary amorphous stability. To further improve the performance of GeTe, various transition metals, such as copper, have been doped in GeTe in recent works. However, the effect of the doped transition metals on the stability of amorphous GeTe is not known. Here, we shed light on this problem for the system of Cu doped GeTe by means of ab initio molecular dynamics calculations. Our results show that the doped Cu atoms tend to agglomerate in amorphous GeTe. Further, base on analyzing the pair correlation functions, coordination numbers and bond angle distributions, remarkable changes in the local structure of amorphous GeTe induced by Cu are obviously seen. The present work may provide some clues for understanding the effect of early transition metals on the local structure of amorphous phase-change compounds, and hence should be helpful for optimizing the structure and performance of phase-change materials by doping transition metals.

Zhang, Linchuan; Sa, Baisheng [Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005 (China); Zhou, Jian; Sun, Zhimei, E-mail: zmsun@buaa.edu.cn [School of Materials Science and Engineering, and Center for Integrated Computational Materials Engineering, International Research Institute for Multidisciplinary Science, Beihang University, Beijing 100191 (China); Song, Zhitang [State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-System and Information Technology, CAS, 200050 Shanghai (China)

2014-10-21T23:59:59.000Z

124

E-Print Network 3.0 - alpha-epsilon phase change Sample Search...  

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

The New York Times Rebels vow to keep up fight for political change in Sudan KAMPALA, Uganda -- Rebels... but also vowing to take the fight nationwide to pursue political change...

125

05/05/2014 11:01Nanotechnology's Revolutionary Next Phase Page 1 of 7http://www.forbes.com/sites/brucedorminey/2013/02/26/nanotechnologys-civilization-changing-revolutionary-next-phase/  

E-Print Network [OSTI]

05/05/2014 11:01Nanotechnology's Revolutionary Next Phase Page 1 of 7http://www.forbes.com/sites/brucedorminey/2013/02/26/nanotechnologys-civilization-changing-revolutionary-next-phase/ TECH (/TECHNOLOGY) 5:01Nanotechnology's Revolutionary Next Phase Page 2 of 7http://www.forbes.com/sites/brucedorminey/2013

126

Innovative Application of Maintenance-Free Phase-Change Thermal Energy Storage for Dish-Engine Solar Power Generation  

SciTech Connect (OSTI)

This final report summarizes the final results of the Phase II Innovative Application of Maintenance-Free Phase-Change Thermal Energy Storage for Dish-Engine Solar Power Generation project being performed by Infinia Corporation for the U.S. Department of Energy under contract DE-FC36-08GO18157 during the project period of September 1, 2009 - August 30, 2012. The primary objective of this project is to demonstrate the practicality of integrating thermal energy storage (TES) modules, using a suitable thermal salt phase-change material (PCM) as its medium, with a dish/Stirling engine; enabling the system to operate during cloud transients and to provide dispatchable power for 4 to 6 hours after sunset. A laboratory prototype designed to provide 3 kW-h of net electrical output was constructed and tested at Infinia's Ogden Headquarters. In the course of the testing, it was determined that the system's heat pipe network - used to transfer incoming heat from the solar receiver to both the Stirling generator heater head and to the phase change salt - did not perform to expectations. The heat pipes had limited capacity to deliver sufficient heat energy to the generator and salt mass while in a charging mode, which was highly dependent on the orientation of the device (vertical versus horizontal). In addition, the TES system was only able to extract about 30 to 40% of the expected amount of energy from the phase change salt once it was fully molten. However, the use of heat pipes to transfer heat energy to and from a thermal energy storage medium is a key technical innovation, and the project team feels that the limitations of the current device could be greatly improved with further development. A detailed study of manufacturing costs using the prototype TES module as a basis indicates that meeting DOE LCOE goals with this hardware requires significant efforts. Improvement can be made by implementing aggressive cost-down initiatives in design and materials, improving system performance by boosting efficiencies, and by refining cost estimates with vendor quotes in lieu of mass-based approaches. Although the prototype did not fully demonstrate performance and realize projected cost targets, the project team believes that these challenges can be overcome. The test data showed that the performance can be significantly improved by refining the heat pipe designs. However, the project objective for phase 3 is to design and test on sun the field ready systems, the project team feels that is necessary to further refine the prototype heat pipe design in the current prototype TES system before move on to field test units, Phase 3 continuation will not be pursued.

Qui, Songgang [Temple University] [Temple University; Galbraith, Ross [Infinia] [Infinia

2013-01-23T23:59:59.000Z

127

Laminar Flow Forced Convection Heat Transfer Behavior of Phase Change Material Fluid in Straight and Staggered Pin Microchannels  

E-Print Network [OSTI]

? Density Subscripts b Bulk i Inlet w Wall 1 Start of melting 2 End of melting Superscripts `` Flux - Average Acronyms CHF Constant heat glux CWT Constant wall temperature PCM Phase change material ix TABLE...:8 microchannel under T boundary condition .............. 52 Figure 32 Nusselt number for square pins geometry using CHF boundary condition ... 55 Figure 33 Nusselt number for circular pins geometry using CHF boundary condition . 55 Figure 34 Fluid...

Kondle, Satyanarayana

2011-10-21T23:59:59.000Z

128

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

129

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

130

Epigenetic remodelling of brain, body and behaviour during phase change in locusts  

E-Print Network [OSTI]

or drugs that mimic its effect Forced Crowding of Solitarious Phase Locusts leads to: STOP GO Serotonin 1 2 3 4 5 6 7 8 9 0 2 4 6 8 m ul tip le o f g re ga rio us v al ue long term gregarious I S O L A T E D 24 h 1 stadium 1 generation 2 generations 3... generations C R O W D E D 4 h 24 h 1 stadium A D i E C B Serotonin n=12 control n=18 serotonin 0 20 40 60 80 % L oc us ts n=13 n=10 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1 0 20 40 60 80 controlAMTP % L oc us ts Behavioural phase state (P greg ) solitarious...

Burrows, Malcolm; Rogers, Stephen M; Ott, Swidbert R

2011-07-26T23:59:59.000Z

131

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

132

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

133

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

134

DOE SBIR Phase II Final Technical Report - Assessing Climate Change Effects on Wind Energy  

SciTech Connect (OSTI)

Specialized Vertum Partners software tools were prototyped, tested and commercialized to allow wind energy stakeholders to assess the uncertainties of climate change on wind power production and distribution. This project resulted in three commercially proven products and a marketing tool. The first was a Weather Research and Forecasting Model (WRF) based resource evaluation system. The second was a web-based service providing global 10m wind data from multiple sources to wind industry subscription customers. The third product addressed the needs of our utility clients looking at climate change effects on electricity distribution. For this we collaborated on the Santa Ana Wildfire Threat Index (SAWTi), which was released publicly last quarter. Finally to promote these products and educate potential users we released “Gust or Bust”, a graphic-novel styled marketing publication.

Whiteman, Cameron; Capps, Scott

2014-11-05T23:59:59.000Z

135

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.

136

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

137

Potential Energy Savings Due to Phase Change Material in a Building Wall Assembly: An Examination of Two Climates  

SciTech Connect (OSTI)

Phase change material (PCM), placed in an exterior wall, alters the temperature profile within the wall and thus influences the heat transport through the wall. This may reduce the net energy transport through the wall via interactions with diurnal temperature swings in the external environment or reduce the electricity needed to meet the net load through the wall by shifting the time of the peak load to a time when the cooling system operates more efficiently. This study covers a broad range of parameters that can influence the effectiveness of such a merged thermal storage-thermal insulation system. These parameters included climate, PCM location within the wall, amount of PCM, midpoint of the PCM melting and freezing range relative to the indoor setpoint temperature, temperature range over which phase change occurs, and the wall orientation. Two climates are investigated using finite difference and optimization analyses: Phoenix and Baltimore, with two utility rate schedules. Although potential savings for a PCM with optimized properties were greater when the PCM was concentrated near the inside wall surface, other considerations described here lead to a recommendation for a full-thickness application. An examination of the temperature distribution within the walls also revealed the potential for this system to reduce the amount of energy transported through the wall framing. Finally, economic benefits can exceed energy savings when time-of-day utility rates are in effect, reflecting the value of peak load reductions for the utility grid.

Childs, Kenneth W [ORNL; Stovall, Therese K [ORNL

2012-03-01T23:59:59.000Z

138

Electrochemical-thermal modeling and microscale phase change for passive internal thermal management of lithium ion batteries.  

SciTech Connect (OSTI)

A fully coupled electrochemical and thermal model for lithium-ion batteries is developed to investigate the impact of different thermal management strategies on battery performance. In contrast to previous modeling efforts focused either exclusively on particle electrochemistry on the one hand or overall vehicle simulations on the other, the present work predicts local electrochemical reaction rates using temperature-dependent data on commercially available batteries designed for high rates (C/LiFePO{sub 4}) in a computationally efficient manner. Simulation results show that conventional external cooling systems for these batteries, which have a low composite thermal conductivity ({approx}1 W/m-K), cause either large temperature rises or internal temperature gradients. Thus, a novel, passive internal cooling system that uses heat removal through liquid-vapor phase change is developed. Although there have been prior investigations of phase change at the microscales, fluid flow at the conditions expected here is not well understood. A first-principles based cooling system performance model is developed and validated experimentally, and is integrated into the coupled electrochemical-thermal model for assessment of performance improvement relative to conventional thermal management strategies. The proposed cooling system passively removes heat almost isothermally with negligible thermal resistances between the heat source and cooling fluid. Thus, the minimization of peak temperatures and gradients within batteries allow increased power and energy densities unencumbered by thermal limitations.

Fuller, Thomas F. (Georgia Institute of Technology, Atlanta, GA); Bandhauer, Todd (Georgia Institute of Technology, Atlanta, GA); Garimella, Srinivas (Georgia Institute of Technology, Atlanta, GA)

2012-01-01T23:59:59.000Z

139

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

140

Validation Methodology to Allow Simulated Peak Reduction and Energy Performance Analysis of Residential Building Envelope with Phase Change Materials: Preprint  

SciTech Connect (OSTI)

Phase change materials (PCM) represent a potential technology to reduce peak loads and HVAC energy consumption in residential buildings. This paper summarizes NREL efforts to obtain accurate energy simulations when PCMs are modeled in residential buildings: the overall methodology to verify and validate Conduction Finite Difference (CondFD) and PCM algorithms in EnergyPlus is presented in this study. It also shows preliminary results of three residential building enclosure technologies containing PCM: PCM-enhanced insulation, PCM impregnated drywall and thin PCM layers. The results are compared based on predicted peak reduction and energy savings using two algorithms in EnergyPlus: the PCM and Conduction Finite Difference (CondFD) algorithms.

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

2012-08-01T23:59:59.000Z

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.


141

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

142

CO2 Capture with Liquid-to-Solid Absorbents: CO2 Capture Process Using Phase-Changing Absorbents  

SciTech Connect (OSTI)

IMPACCT Project: GE and the University of Pittsburgh are developing a unique CO2 capture process in which a liquid absorbent, upon contact with CO2, changes into a solid phase. Once in solid form, the material can be separated and the CO2 can be released for storage by heating. Upon heating, the absorbent returns to its liquid form, where it can be reused to capture more CO2. The approach is more efficient than other solventbased processes because it avoids the heating of extraneous solvents such as water. This ultimately leads to a lower cost of CO2 capture and will lower the additional cost to produce electricity for coal-fired power plants that retrofit their facilities to include this technology.

None

2010-10-01T23:59:59.000Z

143

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

144

Phase Change Material Tower  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGY TAXBalanced ScorecardReactorBatteries for Advanced26, 2005from thePeterInnovative

145

Changes in the Zero-Point Energy of the Protons as the Source of the Binding Energy of Water to A-Phase DNA  

SciTech Connect (OSTI)

The measured changes in the zero-point kinetic energy of the protons are entirely responsible for the binding energy of water molecules to A phase DNA at the concentration of 6 water molecules/base pair. The changes in kinetic energy can be expected to be a significant contribution to the energy balance in intracellular biological processes and the properties of nano-confined water. The shape of the momentum distribution in the dehydrated A phase is consistent with coherent delocalization of some of the protons in a double well potential, with a separation of the wells of 0.2 Angst .

Reiter, G. F. [Physics Department, University of Houston, Houston, Texas 77204 (United States); Senesi, R. [Dipartimento di Fisica and Centro NAST, Universita degli Studi di Roma 'Tor Vergata', Via della Ricerca Scientifica 1, 00133 Roma (Italy); Mayers, J. [ISIS, Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom)

2010-10-01T23:59:59.000Z

146

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

147

Nanometer-scale temperature imaging for independent observation of Joule and Peltier effects in phase change memory devices  

SciTech Connect (OSTI)

This paper reports a technique for independent observation of nanometer-scale Joule heating and thermoelectric effects, using atomic force microscopy (AFM) based measurements of nanometer-scale temperature fields. When electrical current flows through nanoscale devices and contacts the temperature distribution is governed by both Joule and thermoelectric effects. When the device is driven by an electrical current that is both periodic and bipolar, the temperature rise due to the Joule effect is at a different harmonic than the temperature rise due to the Peltier effect. An AFM tip scanning over the device can simultaneously measure all of the relevant harmonic responses, such that the Joule effect and the Peltier effect can be independently measured. Here we demonstrate the efficacy of the technique by measuring Joule and Peltier effects in phase change memory devices. By comparing the observed temperature responses of these working devices, we measure the device thermopower, which is in the range of 30 ± 3 to 250 ± 10 ?V K{sup ?1}. This technique could facilitate improved measurements of thermoelectric phenomena and properties at the nanometer-scale.

Grosse, Kyle L. [Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Pop, Eric [Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); King, William P., E-mail: wpk@illinois.edu [Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Departments of Electrical and Computer Engineering and Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

2014-09-15T23:59:59.000Z

148

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

149

PHYSICAL REVIEW B 83, 134205 (2011) Atomic structure and electronic properties of the SixSb100-x phase-change memory material  

E-Print Network [OSTI]

.134205 PACS number(s): 64.70.dg, 61.20.Gy, 71.15.Mb, 71.15.Pd I. INTRODUCTION Most phase-change random access into the heating electrode (write or rewrite steps) that may result in degradation of the memory device. Further

Svane, Axel Torstein

2011-01-01T23:59:59.000Z

150

Investigation of Temperature-Driven Water Transport in Polymer Electrolyte Fuel Cell: Phase-Change-Induced Flow  

E-Print Network [OSTI]

Investigation of Temperature-Driven Water Transport in Polymer Electrolyte Fuel Cell: Phase cell membranes, a net flux of water was found to flow from the hot to the cold side of the full, 2008. Published January 8, 2009. Proper water management is critical to achieve high performance

Mench, Matthew M.

151

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

152

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

153

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

154

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

155

Magnetic phase transitions and entropy change in layered NdMn{sub 1.7}Cr{sub 0.3}Si{sub 2}  

SciTech Connect (OSTI)

A giant magnetocaloric effect has been observed around the Curie temperature, T{sub C}???42?K, in NdMn{sub 1.7}Cr{sub 0.3}Si{sub 2} with no discernible thermal and magnetic hysteresis losses. Below 400?K, three magnetic phase transitions take place around 380?K, 320?K and 42?K. Detailed high resolution synchrotron and neutron powder diffraction (10–400?K) confirmed the magnetic transitions and phases as follows: T{sub N}{sup intra}???380?K denotes the transition from paramagnetism to intralayer antiferromagnetism (AFl), T{sub N}{sup inter}???320?K represents the transition from the AFl structure to the canted antiferromagnetic spin structure (AFmc), while T{sub C}???42?K denotes the first order magnetic transition from AFmc to canted ferromagnetism (Fmc?+?F(Nd)) due to ordering of the Mn and Nd sub-lattices. The maximum values of the magnetic entropy change and the adiabatic temperature change, around T{sub C} for a field change of 5?T are evaluated to be ??S{sub M}{sup max}???15.9?J kg{sup ?1} K{sup ?1} and ?T{sub ad}{sup max}???5?K, respectively. The first order magnetic transition associated with the low levels of hysteresis losses (thermal

Md Din, M. F., E-mail: mfmd999@uowmail.edu.au; Dou, S. X. [Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522 (Australia); Wang, J. L. [Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522 (Australia); Bragg Institute, Australian Nuclear Science and Technology Organization, Lucas Heights, New South Wales 2234 (Australia); Campbell, S. J. [School of Physical, Environmental, and Mathematical Sciences, The University of New South Wales, Canberra, The Australian Defence Force Academy, Australian Capital Territory 2600 (Australia); Studer, A. J.; Avdeev, M.; Kennedy, S. J. [Bragg Institute, Australian Nuclear Science and Technology Organization, Lucas Heights, New South Wales 2234 (Australia); Gu, Q. F. [Australian Synchrotron, 800 Blackburn Rd, Clayton 3168 (Australia); Zeng, R. [Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522 (Australia); Solar Energy Technologies, School of Computing, Engineering and Mathematics, University of Western Sydney, Penrith, NSW 2751 (Australia)

2014-01-27T23:59:59.000Z

156

Advanced Bio-based Jet Fuel  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartment of EnergyAdministrative Records Schedule1-006TemperatureBiochemical

157

Addendum for the Phase II Groundwater Flow Model of Corrective Action Unit 98: Frenchman Flat, NevadaTest Site, Nye County, Nevada, Revision 0 (page changes)  

SciTech Connect (OSTI)

This document, which makes changes to Phase II Groundwater Flow Model of Corrective Action Unit 98: Frenchman Flat, Nevada Test Site, Nye County, Nevada, S-N/99205--074, Revision 0 (May 2006) was prepared to address review comments on this final document provided by the Nevada Division of Environmental Protection (NDEP) in a letter dated June 20, 2006. The document includes revised pages that address NDEP review comments and comments from other document users. Change bars are included on these pages to identify where the text was revised. In addition to the revised pages, the following clarifications are made: • Section 6.0 Conceptual Model Uncertainty Analyses. Please note that in this section figures showing the observed versus simulated well head (Figures 6-1, 6-5, 6-7, 6-16, 6-28, 6-30, 6-32, 6-34, 6-37, 6-42, 6-47, 6-52, 6-57, 6-62, 6-71, and 6-86) have a vertical break in scale on the y axis. • Section 7.0 Parameter Sensitivity Analysis. In Section 7.2, the parameter perturbation analysis defines two components of the objective function PHI. These two components include the WELL component that represents the head portion of the objective function as measured in wells and the FLUX component that represents the lateral boundary flux portion of the objective function. In the text and figures in Section 7.2, the phrases “well portion of the objective function” and “head portion of the objective function” are used interchangeably in discussions of the WELL component of the objective function.

John McCord

2007-05-01T23:59:59.000Z

158

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

159

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

160

Project Profile: Innovative Application of Maintenance-Free Phase...  

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

Innovative Application of Maintenance-Free Phase-Change Thermal Energy Storage for Dish Systems Project Profile: Innovative Application of Maintenance-Free Phase-Change Thermal...

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

Response of the water balance to climate change in the United States over the 20th and 21st centuries: Results from the VEMAP Phase 2 model intercomparisons  

E-Print Network [OSTI]

distribution: The role of the water balance, Am. Nat. , 135,NPP): The importance of water avail- ability, Global Change1982a), Ecological optimality in water-limited natural soil-

Gordon, W. S; Famiglietti, J. S

2004-01-01T23:59:59.000Z

162

Stabilising the Blue Phases  

E-Print Network [OSTI]

We present an investigation of the phase diagram of cholesteric liquid crystals within the framework of Landau - de Gennes theory. The free energy is modified to incorporate all three Frank elastic constants and to allow for a temperature dependent pitch in the cholesteric phase. It is found that the region of stability of the cubic blue phases depends significantly on the value of the elastic constants, being reduced when the bend elastic constant is larger than splay and when twist is smaller than the other two. Most dramatically we find a large increase in the region of stability of blue phase I, and a qualitative change in the phase diagram, in a system where the cholesteric phase displays helix inversion.

G. P. Alexander; J. M. Yeomans

2006-09-22T23:59:59.000Z

163

Phase I -­? Smart Grid Data Access Pilot Program: Utilizing STEM Education as a Catalyst for Residential Consumer Decision Making and Change  

SciTech Connect (OSTI)

Under Phase I of the Smart Grid Data Access Pilot Program, the Gulf of Maine Research Institute (GMRI) partnered with Central Maine Power (CMP), and the Maine Mathematics and Science Alliance (MMSA) and engaged key vendors Tilson Government Services, LLC (Tilson), and Image Works to demonstrate the efficacy of PowerHouse, an interactive online learning environment linking middle school students with their home electricity consumption data provided through CMP’s Advanced Metering Infrastructure (AMI). The goal of the program is to harness the power of youth to alter home energy consumption behaviors using AMI data. Successful programs aimed at smoking cessation, recycling, and seat belt use have demonstrated the power of young people to influence household behaviors. In an era of increasing concern about energy costs, availability, and human impacts on global climate, GMRI sought to demonstrate the effectiveness of a student-­?focused approach to understanding and managing household energy use. We also sought to contribute to a solid foundation of science-­? literate students who can analyze evidence to find solutions to increasingly complex energy challenges. While technical hurdles prevented us from achieving the scale of student engagement projected in the original proposal, results from Phase I nevertheless demonstrate the effectiveness of PowerHouse to bring science and math home to the kitchen table and to help students and families understand and manage electricity consumption: • 144 teachers learned about PowerHouse through workshops or other events and 33 teachers engaged students in the PowerHouse curriculum in their classrooms over the duration of this project. Fifty teachers have shared plans to use PowerHouse during this calendar year (2015). • Over the duration of this project, 1630 students created accounts on PowerHouse and 295 of these students connected their CMP Energy Manager electricity data to PowerHouse. • During our most recent complete school year (2013-­?2014): o 9 teachers engaged their students in a 4 (or more) week experience using PowerHouse curriculum o Those 9 teachers represented 357 students o 114 of the 357 students were connected to their CMP Energy Manager data through PowerHouse; the remaining students used the PowerHouse program and curriculum without connecting to Energy Manager The number of student accounts connected to their CMP AMI electricity data through PowerHouse is far below the goal of 1000 accounts. This is primarily attributable to successive technical challenges described in more detail below. However, program staff continue to address all aspects of this challenge: ongoing recruitment of teachers into PowerHouse, classroom processes to smooth out communications with families, and streamlining the technology. We anticipate reaching the goal of 1000 total CMP-­?connected accounts by the close of the 2015-­?2016 school year.

Lishness, Alan

2014-11-19T23:59:59.000Z

164

Reactive Distillation for Esterification of Bio-based Organic Acids  

SciTech Connect (OSTI)

The following is the final report of the three year research program to convert organic acids to their ethyl esters using reactive distillation. This report details the complete technical activities of research completed at Michigan State University for the period of October 1, 2003 to September 30, 2006, covering both reactive distillation research and development and the underlying thermodynamic and kinetic data required for successful and rigorous design of reactive distillation esterification processes. Specifically, this project has led to the development of economical, technically viable processes for ethyl lactate, triethyl citrate and diethyl succinate production, and on a larger scale has added to the overall body of knowledge on applying fermentation based organic acids as platform chemicals in the emerging biorefinery. Organic acid esters constitute an attractive class of biorenewable chemicals that are made from corn or other renewable biomass carbohydrate feedstocks and replace analogous petroleum-based compounds, thus lessening U.S. dependence on foreign petroleum and enhancing overall biorefinery viability through production of value-added chemicals in parallel with biofuels production. Further, many of these ester products are candidates for fuel (particularly biodiesel) components, and thus will serve dual roles as both industrial chemicals and fuel enhancers in the emerging bioeconomy. The technical report from MSU is organized around the ethyl esters of four important biorenewables-based acids: lactic acid, citric acid, succinic acid, and propionic acid. Literature background on esterification and reactive distillation has been provided in Section One. Work on lactic acid is covered in Sections Two through Five, citric acid esterification in Sections Six and Seven, succinic acid in Section Eight, and propionic acid in Section Nine. Section Ten covers modeling of ester and organic acid vapor pressure properties using the SPEAD (Step Potential Equilibrium and Dynamics) method.

Fields, Nathan; Miller, Dennis J.; Asthana, Navinchandra S.; Kolah, Aspi K.; Vu, Dung; Lira, Carl T.

2008-09-23T23:59:59.000Z

165

PNNL Expert Alan Zacher Discusses Bio-Based Fuels  

SciTech Connect (OSTI)

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

Alan Zacher

2011-10-01T23:59:59.000Z

166

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

167

Advanced Bio-based Jet Fuel | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists' ResearchThe Office ofReporting (Connecticut)41Adam Garber -ADM-1by USEC, INC.

168

Bio-Based Product Basics | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsBSCmemo.pdf BSCmemo.pdf BSCmemo.pdfBetter BuildingsBetter Plants»

169

Reactive Distillation for Esterification of Bio-based Organic Acids  

Office of Scientific and Technical Information (OSTI)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformation In closing,--SpeedingSpeedingSpeeding access to scienceSpeedingReactive

170

A Bio-Based Fuel Cell for Distributed Energy Generation  

SciTech Connect (OSTI)

The technology we propose consists primarily of an improved design for increasing the energy density of a certain class of bio-fuel cell (BFC). The BFCs we consider are those which harvest electrons produced by microorganisms during their metabolism of organic substrates (e.g. glucose, acetate). We estimate that our technology will significantly enhance power production (per unit volume) of these BFCs, to the point where they could be employed as stand-alone systems for distributed energy generation.

Anthony Terrinoni; Sean Gifford

2008-06-30T23:59:59.000Z

171

Development of a Bio-Based, Inexpensive, Noncorrosive, Nonflammable  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeat Pump Models |Conduct, Parent CompanyaUSAMP AMDHeavy Duty Trucks

172

E-Print Network 3.0 - advanced higher-dimensional phase Sample...  

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

to change the phase... in determin- ing when to change the signal phase. The control law is executed for each traffic signal once Source: Collection: Computer Technologies and...

173

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

174

Laser Crystallization of Phase Change Material  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickrinformationPostdocs space CombinedValuesRevolutionizing the

175

Alpha phase precipitation from phase-separated beta phase in...  

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

Alpha phase precipitation from phase-separated beta phase in a model Ti-Mo-Al alloy studied by direct coupling of transmission Alpha phase precipitation from phase-separated beta...

176

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

177

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

178

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

179

Change Log  

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

Log NERSC-8 Trinity Benchmarks Change Log 09032013 Correction applied to MiniDFT web-page (to remove inconsistency with MiniDFT README). Capability Improvement measurements...

180

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...

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

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

182

CHANGE-POINT METHODS Douglas M. Hawkins  

E-Print Network [OSTI]

been proposed as tools for following up signals given by other charting methods, when their likelihood: Change-point, LRT, GLR, Phase I, Phase II, SPC. 1 #12;1 INTRODUCTION Statistical process control methods will assume is unknown. If both 0 and 1 are known, then the SPC diagnostic of choice is generally

Qiu, Peihua

183

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

184

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

185

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

186

Changing Climates  

E-Print Network [OSTI]

these data with predictions from the IPCC. Professor of geography at Texas State University, Dr. David Butler, does climate change research mainly in the Rocky Moun- tains with U.S. Geological Survey funding. He has also done research on how climate...://wiid.twdb.state.tx.us Detailed information about individual water wells. This system uses a geographic information system-based tool to show locations of water wells and download data on water levels and water quality. Reports that were developed about on-site conditions...

Wythe, Kathy

2008-01-01T23:59:59.000Z

187

Change Log  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and User ExecutiveCentral ActivatorAntennaAPSNationalChange

188

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

189

Analysis of Nuclear Quantum Phase Transitions  

SciTech Connect (OSTI)

A microscopic analysis, based on nuclear energy density functionals, is presented for shape phase transitions in Nd isotopes. Low-lying excitation spectra and transition probabilities are calculated starting from a five-dimensional Hamiltonian, with parameters determined by constrained relativistic mean-field calculations for triaxial shapes. The results reproduce available data, and show that there is an abrupt change of structure at N = 90, that corresponds to a first-order quantum phase transition between spherical and axially deformed shapes.

Li, Z. P.; Meng, J. [State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871 (China); Niksic, T.; Vretenar, D. [Physics Department, Faculty of Science, University of Zagreb (Croatia); Lalazissis, G. A. [Department of Theoretical Physics, Aristotle University of Thessaloniki, GR-54124 (Greece); Ring, P. [Physik-Department der Technischen Universitaet Muenchen, D-85748 Garching (Germany)

2009-08-26T23:59:59.000Z

190

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

191

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

192

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

193

A review on Phase Change Materials Integrated in Building Walls  

E-Print Network [OSTI]

of buildings rise increasingly, the energy consumption is correspondingly increasing. For example, in France buildings are responsible for the consumption of approx- imatively 46% of all energies and approximatively for reducing energy demand, further investigations are needed to really assess their use. Keywords: Thermal

194

Thermal Performance of Phase Change Wallboard for Residential Cooling Application  

E-Print Network [OSTI]

Alternatives to the Compressor Cooling Project sponsored byAlternatives to Compressor Cooling in Residences," Energy

Feustel, H.E.

2011-01-01T23:59:59.000Z

195

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

196

Experimental Investigation of Wallboard Containing Phase Change Material: Data for  

E-Print Network [OSTI]

. It is then a potential method for reducing energy consumption in passively designed buildings. This tendency is confirmed/release of energy from the solar radiation and/or internal loads. The application of such materials for lightweight construction (e.g. a wood house) makes it possible to im- prove thermal comfort in summer and reduce heating

197

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

198

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

199

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

200

Optimization of Phase Change Heat Transfer in Biporous Media  

E-Print Network [OSTI]

in Compressed Open- Celled Foams”. Numerical Heat Transfer,open the need to effectively estimate the heat transfer inopen porosities for different packed bed of spheres arrangements. The scaled heat transfer

Reilly, Sean

2013-01-01T23:59:59.000Z

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

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

202

SECURITY REFRESH: PROTECTING PHASE-CHANGE MEMORY AGAINST  

E-Print Network [OSTI]

SOFTWARE. ......Given the grim prospect of technology scaling in flash memories and dynamic RAM (DRAM), designers are seeking alternative memory technologies to continue the prophecy of Moore's law for memories device totally useless in a matter of minutes because it has a faster ac- cess speed than flash

Lee, Hsien-Hsin "Sean"

203

Optimized Structures for Low-Profile Phase Change Thermal Spreaders  

E-Print Network [OSTI]

Journal of Microelectromechanical Systems, October (13) No.Journal of Microelectromechanical Systems, 19 no. 3, pp.

Sharratt, Stephen A.

2012-01-01T23:59:59.000Z

204

Opportunities to Apply Phase Change Materials to Building Enclosures  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d F SSales LLCDiesel Enginesthe U.S. -- An Overview |

205

Project Profile: Encapsulated Phase Change Material in Thermal Storage for  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergyDepartment ofOil'sofAppendix B, SeptemberandID ProjectBaseload CSP Plants |

206

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

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d FNEPA/309DepartmentDepartment ofCycles |Perovskites forReactions

207

Project Profile: Innovative Phase Change Thermal Energy Storage Solution  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d FNEPA/309DepartmentDepartment ofCycles |PerovskitesSystem |for

208

Building America Webinar: Opportunities to Apply Phase Change Materials to  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd:June 2015 < prev next >researchNew ConstructionBuilding

209

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

210

An Application of Phase Change Technology in a Greenhouse  

E-Print Network [OSTI]

Materials and Solar Cells, 1998,51: 401?411 [2] Yang Chun, Ge Xinshi, Cheng Shuxia. A theoretical and experimental study of the heat transfer problems in the greenhouse. Acta Energiae Solaris ICEBO2006, Shenzhen, China Envelope Technologies... Energiae Solaris Sinica, 2003,24,6(12): 789-794. (In Chinese) [4] J.G.Pieters, J.M.Deltour. Modelling solar energy input in greenhouses. Solar Energy,1999,67: 119?130 [5] Mathala J. Gupta, Pitam Chandra. Effect of greenhouse design parameters...

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

2006-01-01T23:59:59.000Z

211

The Phase Transition of Dark Energy  

E-Print Network [OSTI]

Considering that the universe is filled with the nonrelativistic matter and dark energy and each component is respectively satisfied with its conservation condition in the absence of their interaction, we give the change rate of the fractional density and the density of dark energy from the conservation condition. It is clear that the fractional density of dark energy will monotonously increase and gradually become the dominating contribution to the universe as the redshift becomes low. Combining the evolutional trend of the state equation of dark energy and the change rate of the density of dark energy we find that the density of dark energy will decrease up to a minimum and whereafter it will increase again as the redshift becomes low. This can be regarded as the phase transition of dark energy from the quintessence phase to the phantom phase.

Wei Wang; Yuanxing Gui; Ying Shao

2006-12-05T23:59:59.000Z

212

Gymnastics in Phase Space  

SciTech Connect (OSTI)

As accelerator technology advances, the requirements on accelerator beam quality become increasingly demanding. Facing these new demands, the topic of phase space gymnastics is becoming a new focus of accelerator physics R&D. In a phase space gymnastics, the beam's phase space distribution is manipulated and precision tailored to meet the required beam qualities. On the other hand, all realization of such gymnastics will have to obey accelerator physics principles as well as technological limitations. Recent examples of phase space gymnastics include Emittance exchanges, Phase space exchanges, Emittance partitioning, Seeded FELs and Microbunched beams. The emittance related topics of this list are reviewed in this report. The accelerator physics basis, the optics design principles that provide these phase space manipulations, and the possible applications of these gymnastics, are discussed. This fascinating new field promises to be a powerful tool of the future.

Chao, Alexander Wu; /SLAC

2012-03-01T23:59:59.000Z

213

Crystal phase identification  

DOE Patents [OSTI]

A method and apparatus for determining the crystalline phase and crystalline characteristics of a sample. This invention provides a method and apparatus for unambiguously identifying and determining the crystalline phase and crystalline characteristics of a sample by using an electron beam generator, such as a scanning electron microscope, to obtain a backscattered electron Kikuchi pattern of a sample, and extracting crystallographic and composition data that is matched to database information to provide a quick and automatic method to identify crystalline phases.

Michael, Joseph R. (Albuquerque, NM); Goehner, Raymond P. (Albuquerque, NM); Schlienger, Max E. (Albuquerque, NM)

2001-01-01T23:59:59.000Z

214

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,...

215

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

216

Apportioning Climate Change Costs  

E-Print Network [OSTI]

Apportioning Climate Change Costs Daniel A. Farber* I. II.ON CLIMATE CHANGE FOUR QUESTIONS ABOUTof how to respond to climate change. Most public attention

Farber, Daniel A.

2008-01-01T23:59:59.000Z

217

Clustering versus non-clustering phase synchronizations  

SciTech Connect (OSTI)

Clustering phase synchronization (CPS) is a common scenario to the global phase synchronization of coupled dynamical systems. In this work, a novel scenario, the non-clustering phase synchronization (NPS), is reported. It is found that coupled systems do not transit to the global synchronization until a certain sufficiently large coupling is attained, and there is no clustering prior to the global synchronization. To reveal the relationship between CPS and NPS, we further analyze the noise effect on coupled phase oscillators and find that the coupled oscillator system can change from CPS to NPS with the increase of noise intensity or system disorder. These findings are expected to shed light on the mechanism of various intriguing self-organized behaviors in coupled systems.

Liu, Shuai [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China) [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China); University of Chinese Academy of Sciences, Beijing 100049 (China); Zhan, Meng, E-mail: zhanmeng@wipm.ac.cn [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)] [Wuhan Center for Magnetic Resonance, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)

2014-03-15T23:59:59.000Z

218

Phase 1 -- 4  

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

Requirements" " " "Phase Two - Initial Project Development" "Replace Std Task 2-1","DO RFP Development - On Site Consultation","FEMP Services will provide technical consultation...

219

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

220

Flexoelectric blue phases  

E-Print Network [OSTI]

We describe the occurence and properties of liquid crystal phases showing two dimensional splay and bend distortions which are stabilised by flexoelectric interactions. These phases are characterised by regions of locally double splayed order separated by topological defects and are thus highly analogous to the blue phases of cholesteric liquid crystals. We present a mean field analysis based upon the Landau--de Gennes Q-tensor theory and construct a phase diagram for flexoelectric structures using analytic and numerical results. We stress the similarities and discrepancies between the cholesteric and flexoelectric cases.

G P Alexander; J M Yeomans

2007-07-01T23:59:59.000Z

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

Thermodynamically Stable Blue Phases  

E-Print Network [OSTI]

We show theoretically that flexoelectricity stabilizes blue phases in chiral liquid crystals. Induced internal polarization reduces the elastic energy cost of splay and bend deformations surrounding singular lines in the director field. The energy of regions of double twist is unchanged. This in turn reduces the free energy of the blue phase with respect to that of the chiral nematic phase, leading to stability over a wider temperature range. The theory explains the discovery of large temperature range blue phases in highly flexoelectric "bimesogenic" and "bent-core" materials, and predicts how this range may be increased further.

F. Castles; S. M. Morris; E. M. Terentjev; H. J. Coles

2011-01-28T23:59:59.000Z

222

The Many Phases of Holographic Superfluids  

E-Print Network [OSTI]

We investigate holographic superfluids in AdS_{d+1} with d=3,4 in the non-backreacted approximation for various masses of the scalar field. In d=3 the phase structure is universal for all the masses that we consider: the critical temperature decreases as the superfluid velocity increases, and as it is cranked high enough, the order of the phase transition changes from second to first. Surprisingly, in d=4 we find that the phase structure is more intricate. For sufficiently high mass, there is always a second order phase transition to the normal phase, no matter how high the superfluid velocity. For some parameters, as we lower the temperature, this transition happens before a first order transition to a new superconducting phase. Across this first order transition, the gap in the transverse conductivity jumps from almost zero to about half its maximum value. We also introduce a double scaling limit where we can study the phase transitions (semi-)analytically in the large velocity limit. The results corroborate and complement our numerical results. In d=4, this approach has the virtue of being fully analytically tractable.

Daniel Arean; Pallab Basu; Chethan Krishnan

2010-08-04T23:59:59.000Z

223

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

224

UPVG phase 2 report  

SciTech Connect (OSTI)

The Utility PhotoVoltaic Group (UPVG), supported by member dues and a grant from the US Department of Energy, has as its mission the acceleration of the use of cost-effective small-scale and emerging large-scale applications of photovoltaics for the benefit of electric utilities and their customers. Formed in October, 1992, with the support of the American Public Power Association, Edison Electric Institute, and the National Rural Electric Cooperative Association, the UPVG currently has 90 members from all sectors of the electric utility industry. The UPVG`s efforts as conceived were divided into four phases: Phase 0--program plan; Phase 1--organization and strategy development; Phase 2--creating market assurance; and Phase 3--higher volume purchases. The Phase 0 effort developed the program plan and was completed early in 1993. The Phase 1 goal was to develop the necessary background information and analysis to lead to a decision as to which strategies could be undertaken by utilities to promote greater understanding of PV markets and achieve increased volumes of PV purchases. This report provides the details of the UPVG`s Phase 2 efforts to initiate TEAM-UP, its multiyear, 50-MW hardware initiative.

NONE

1995-08-01T23:59:59.000Z

225

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

226

E-Print Network 3.0 - aqueous phase source Sample Search Results  

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

Basins Research Initiative Collection: Environmental Sciences and Ecology 64 Definitions CaX(s) + 90 Summary: phases that includes an aqueous solution, such as the mass change...

227

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

228

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

229

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

E-Print Network [OSTI]

comprises the largest quantity of biomass residue in theof transporting large quantities of biomass to the bioenergy

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

2013-01-01T23:59:59.000Z

230

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

231

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

232

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

233

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

234

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

235

Bio-based fuels and chemicals: the end of the beginning  

E-Print Network [OSTI]

· Jatropha, cassava, and switchgrass · Algae · Genetically-modified organisms · Cellulose · Hemicellulose

Iglesia, Enrique

236

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

237

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

238

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

E-Print Network [OSTI]

context of two leading biomass feedstocks—perennial energyFarmers Will Supply Biomass Feedstocks for Energy Production

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

2013-01-01T23:59:59.000Z

239

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

240

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

E-Print Network [OSTI]

providing a definition for “renewable biomass”). 9. Energyrapidly evolving world of renewable energy, it is clear thatrecognize the importance of renewable energy in combating

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

2013-01-01T23:59:59.000Z

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.


241

Commercialization of Bio-Based Chemicals: A Successful Public-Private Partnership  

Broader source: Energy.gov [DOE]

Opening Plenary Session: Celebrating Successes—The Foundation of an Advanced Bioindustry Not All Chemicals Are Created Equal—Susan Hager, Senior Vice President, Corporate Communications and Government Affairs, Myriant

242

Conversion of rice straw to bio-based chemicals: an integrated process using Lactobacillus brevis  

E-Print Network [OSTI]

acetic acid, and ethanol concentration increased only for the initial 34 h then remained constant suggesting fermentationacetic acid, and ethanol were 0.92, 0.63, and 0.32 (mM/mM), respectively. Fermentation

Kim, Jae-Han; Block, David E.; Shoemaker, Sharon P.; Mills, David A.

2010-01-01T23:59:59.000Z

243

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

244

SciTech Connect: Reactive Distillation for Esterification of Bio-based  

Office of Scientific and Technical Information (OSTI)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinan antagonist Journal Article:Biasi, A.long baseline neutrino experiment" Find +SearchUsOrganic

245

Next Generation Bio-Based & Sustainable Chemicals Summit | Department of  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in3.pdfEnergyDepartment of Energy Advanced Framing - Building America TopAttics

246

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...

247

Bio-based ethylene able to replace petroleum as a feedstock - Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to someone6 M. Babzien, I.ProgramBig Sol Big Sol

248

Bio-based Deicing/Anti-Icing Fluids - Energy Innovation Portal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScienceCareers Apply for aCould WorkVehicles and Fuels Find More Like

249

Bio-based Deicing/Anti-Icing Fluids - Energy Innovation Portal  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScienceCareers Apply for aCould WorkVehicles and Fuels Find More

250

Bio-based photosynthetic conversion of CO2 and water to replace petroleum  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAboutScienceCareers Apply for aCould WorkVehicles and Fuels Find

251

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

E-Print Network [OSTI]

bioenergy crops. Experience tells us that spot markets traditionally fail to develop due to inadequate competition and pricebioenergy purposes. 61 Similarly, commodity market strategies provide key risk management tools for producers to manage price

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

2013-01-01T23:59:59.000Z

252

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

253

Experimental verification of electro-refractive phase modulation in graphene  

E-Print Network [OSTI]

Graphene has been considered as a promising material for opto-electronic devices, because of its tunable and wideband optical properties. In this work, we demonstrate electro-refractive phase modulation in graphene at wavelengths from 1530 to 1570 nm. By integrating a gated graphene layer in a silicon-waveguide based Mach-Zehnder interferometer, the key parameters of a phase modulator like change in effective refractive index, insertion loss and absorption change are extracted. These experimentally obtained values are well reproduced by simulations and design guidelines are provided to make graphene devices competitive to contemporary silicon based phase modulators for on-chip applications.

Mohsin, Muhammad; Schall, Daniel; Otto, Martin; Matheisen, Christopher; Giesecke, Anna Lena; Sagade, Abhay A; Kurz, Heinrich

2015-01-01T23:59:59.000Z

254

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

255

Combustion 2000: Phase II  

SciTech Connect (OSTI)

The goals of the program are to develop a coal-fired high performance power generation system (HIPPS) that is capable of: thermal efficiency (HHV) {ge} 47%; NOx, SOx, and particulates {le} 10% NSPS (New Source Performance Standard); coal providing {ge} 65% of heat input; all solid wastes benign; and cost of electricity {le} 90% of present plants. Phase 1, which began in 1992, focused on the analysis of various configurations of indirectly fired cycles and on technical assessments of alternative plant subsystems and components, including performance requirements, developmental status, design options, complexity and reliability, and capital and operating costs. Phase 1 also included preliminary R and D and the preparation of designs for HIPPS commercial plants approximately 300 MWe in size. This Phase, Phase 2, had as its initial objective the development of a complete design base for the construction and operation of a HIPPS prototype plant to be constructed in Phase 3. As part of a descoping initiative, the Phase 3 program has been eliminated and work related to the commercial plant design has been ended. The rescoped program retained a program of engineering research and development focusing on high temperature heat exchangers, e.g. HITAF development (Task 2); a rescoped Task 6 that is pertinent to Vision 21 objectives and focuses on advanced cycle analysis and optimization, integration of gas turbines into complex cycles, and repowering designs; and preparation of the Phase 2 Technical Report (Task 8). This rescoped program deleted all subsystem testing (Tasks 3, 4,and 5) and the development of a site-specific engineering design and test plan for the HIPPS prototype plant (Task 7). Work reported herein is from: Task 2.1 HITAF Combustors; Task 2.2 HITAF Air Heaters; and Task 6 HIPPS Commercial Plant Design Update.

Unknown

1999-11-01T23:59:59.000Z

256

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

257

Moessbauer measurements of microstructural change in aged duplex stainless steel  

SciTech Connect (OSTI)

A duplex stainless steel (ASME SA351 CF8M) has usually been manufactured by a continuous casting technique. It consists of a paramagnetic austenite phase and a ferromagnetic ferrite phase. It has been known that the ferrite phase decomposition occurs in this steel after aging between 300 and 450 C. As a result of phase decomposition, a Fe-rich phase and a Cr-rich phase are produced in the ferrite phase. It is difficult to detect the phase decomposition even by not only optical microscopy but also transmission electron microscopy, since the decomposed structure is very fine. However, Moessbauer measurements that can detect the magnetic hyperfine field of magnetic substance may detect the microstructural change. An averaged magnetic hyperfine field increases in the ferrite phase, due to the production of the Fe-rich phase which has high magnetic hyperfine field. Therefore, the authors investigated the phase decomposition of the duplex stainless steel caused by aging, utilization Moessbauer spectroscopy which has capability of detecting this structural change in the atomic level quantitatively. The authors also investigated the potential of backscattering Moessbauer method for NDE technique.

Kirihigashi, A.; Sakamoto, N.; Yamaoka, T. [Mitsubishi Heavy Industries, Ltd., Hyogo (Japan); Nasu, S. [Osaka Univ. (Japan)

1995-08-01T23:59:59.000Z

258

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

259

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

260

Climate Change Response  

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

the Interior Climate Change Response "From the Everglades to the Great Lakes to Alaska and everywhere in between, climate change is a leading threat to natural and cultural...

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

Quick-change filter cartridge  

DOE Patents [OSTI]

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

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

1995-01-01T23:59:59.000Z

262

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

263

Sensitive characterization of phase and amplitude semiconductor nonlinearities for broadband 20 fs excitation  

E-Print Network [OSTI]

for broadband excitation. We find that the pump-induced phase changes at the exciton and in the continuum decay chopping and lock-in detection. In our setup, phase dynamics can be studied in a temporal window limited, we have studied phase and amplitude semiconductor nonlinearities for broadband excitation of ex

Keller, Ursula

264

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

265

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...

266

Switching dynamics in cholesteric blue phases  

E-Print Network [OSTI]

Blue phases are networks of disclination lines, which occur in cholesteric liquid crystals near the transition to the isotropic phase. They have recently been used for the new generation of fast switching liquid crystal displays. Here we study numerically the steady states and switching hydrodynamics of blue phase I (BPI) and blue phase II (BPII) cells subjected to an electric field. When the field is on, there are three regimes: for very weak fields (and strong anchoring at the boundaries) the blue phases are almost unaffected, for intermediate fields the disclinations twist (for BPI) and unzip (for BPII), whereas for very large voltages the network dissolves in the bulk of the cell. Interestingly, we find that a BPII cell can recover its original structure when the field is switched off, whereas a BPI cell is found to be trapped more easily into metastable configurations. The kinetic pathways followed during switching on and off entails dramatic reorganisation of the disclination networks. We also discuss the effect of changing the director field anchoring at the boundary planes and of varying the direction of the applied field.

A. Tiribocchi; G. Gonnella; D. Marenduzzo; E. Orlandini

2011-03-30T23:59:59.000Z

267

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

268

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

269

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

270

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

271

Climate Change, Adaptation, and Development  

E-Print Network [OSTI]

Climate Change, Adaptation, and Development Daniel H. Cole*THE COSTS OF CLIMATE CHANGE . ADAPTATIONCONVENTION ON CLIMATE CHANGE . IV. A.

Cole, Daniel H.

2008-01-01T23:59:59.000Z

272

Silicon photonics thermal phase shifter with reduced temperature range  

SciTech Connect (OSTI)

Optical devices, phased array systems and methods of phase-shifting an input signal are provided. An optical device includes a microresonator and a waveguide for receiving an input optical signal. The waveguide includes a segment coupled to the microresonator with a coupling coefficient such that the waveguide is overcoupled to the microresonator. The microresonator received the input optical signal via the waveguide and phase-shifts the input optical signal to form an output optical signal. The output optical signal is coupled into the waveguide via the microresonator and transmitted by the waveguide. At an operating point of the optical device, the coupling coefficient is selected to reduce a change in an amplitude of the output optical signal and to increase a change in a phase of the output optical signal, relative to the input optical signal.

Lentine, Anthony L; Kekatpure, Rohan D; DeRose, Christopher; Davids, Paul; Watts, Michael R

2013-12-17T23:59:59.000Z

273

Phase transformations in ferrite phase of a duplex stainless steel aged at 500[degree]C  

SciTech Connect (OSTI)

Due to their high strength, high corrosion resistance, and good properties of castings, duplex stainless steels are widely used in the recirculation system of nuclear power plants. Although the presence of ferrite phase increases the strength and the resistance to SCC, the ferrite phase also brings about thermal aging embrittlement known as 475 C embrittlement''. The room temperature impact strength can decrease by 80% after aging for 8 years at a temperature as low as 300 C. Much research has been performed on the low temperature embrittlement of duplex stainless steels. It is generally acknowledged that the spinodal decomposition in ferrite phase and precipitation of some other carbides or nickel silicide are responsible for the degradation in mechanical properties of duplex stainless steels at low temperatures. The extent of the degradation was found to be strongly dependent on the composition in ferrite, which is closely related to the change of microstructure. Thus, the exact evolution of phase transformation in ferrite has also drawn a large audience. In this study, using electron microscopy, the authors investigated the phase evolution of ferrite phase in duplex stainless steel, aged at 500 C. up to 10,000 hours.

Shiao, J.J.; Tsai, C.H.; Huang, J.H.; Kai, J.J. (National Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Nuclear Engineering)

1993-12-01T23:59:59.000Z

274

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

275

Change in historic buildings  

E-Print Network [OSTI]

Change in historic buildings is inevitable. If these changes are not well-managed, the cityscape will be threatened because a city is composed of buildings. A good city should combine both growth and preservation. Controlling ...

Yin, Chien-Ni

1992-01-01T23:59:59.000Z

276

Theory of Polar Blue Phases  

E-Print Network [OSTI]

In liquid crystals, if flexoelectric couplings between polar order and director gradients are strong enough, the uniform nematic phase can become unstable to formation of a modulated polar phase. Previous theories have predicted two types of modulation, twist-bend and splay-bend; the twist-bend phase has been found in recent experiments. Here, we investigate other types of modulation, using lattice simulations and Landau theory. In addition to twist-bend and splay-bend, we also find polar blue phases, with 2D or 3D modulations of both director and polar order. We compare polar blue phases with chiral blue phases, and discuss opportunities for observing them experimentally.

Shaikh M. Shamid; David W. Allender; Jonathan V. Selinger

2014-05-22T23:59:59.000Z

277

Retrieval of Cloud Phase Using the Moderate Resolution Imaging Spectroradiometer Data during the Mixed-Phase Arctic Cloud Experiment  

SciTech Connect (OSTI)

Improving climate model predictions over Earth's polar regions requires a comprehensive knowledge of polar cloud microphysics. Over the Arctic, there is minimal contrast between the clouds and background snow surface, making it difficult to detect clouds and retrieve their phase from space. Snow and ice cover, temperature inversions, and the predominance of mixed-phase clouds make it even more difficult to determine cloud phase. Also, since determining cloud phase is the first step toward analyzing cloud optical depth, particle size, and water content, it is vital that the phase be correct in order to obtain accurate microphysical and bulk properties. Changes in these cloud properties will, in turn, affect the Arctic climate since clouds are expected to play a critical role in the sea ice albedo feedback. In this paper, the IR trispectral technique (IRTST) is used as a starting point for a WV and 11-{micro}m brightness temperature (T11) parameterization (WVT11P) of cloud phase using MODIS data. In addition to its ability to detect mixed-phase clouds, the WVT11P also has the capability to identify thin cirrus clouds overlying mixed or liquid phase clouds (multiphase ice). Results from the Atmospheric Radiation Measurement (ARM) MODIS phase model (AMPHM) are compared to the surface-based cloud phase retrievals over the ARM North Slope of Alaska (NSA) Barrow site and to in-situ data taken from University of North Dakota Citation (CIT) aircraft which flew during the Mixed-Phase Arctic Cloud Experiment (MPACE). It will be shown that the IRTST and WVT11P combined to form the AMPHM can achieve a relative high accuracy of phase discrimination compared to the surface-based retrievals. Since it only uses MODIS WV and IR channels, the AMPHM is robust in the sense that it can be applied to daytime, twilight, and nighttime scenes with no discontinuities in the output phase.

Spangenberg, D.; Minnis, P.; Shupe, M.; Uttal, T.; Poellot, M.

2005-03-18T23:59:59.000Z

278

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

279

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

280

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

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

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.

282

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

283

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

284

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

285

Multi-phasing CFD  

SciTech Connect (OSTI)

Computational fluid dynamics for multiphase flows is an emerging field. Due to the complexity and divergence of multiphase thermal and hydraulic problems, further development of multiphase flow modelling, closure laws and numerical methods is needed in order to achieve the general purpose and optimised CFD (Computational Fluid Dynamics) methods, which will be applicable to the wide variety of multiphase flow problems. In the paper, an original approach to the various aspects of multiphase CFD modelling is presented. It is based on the multi-fluid modelling approach, development of necessary closure laws and derivation of appropriate numerical methods for efficient governing equations solution. Velocity and pressure fields are solved with the SIMPLE (Semi-Implicit Method for Pressure-Linked Equations) type pressure-corrector method developed for the multiphase flow conditions. For the solution of scalar parameters transport equations both implicit and explicit methods are presented. The implicit method is suitable for steady state, slow transients and problems without the sharp fronts propagation. Explicit method is developed in order to predict scalar parameters fronts propagation, as well as phase interface tracking problems. The challenge towards the multiphase flow solution on both the macro and micro level is presented in order to perform multiphase CFD simulations and analyses of multiphase flows in complex geometry of nuclear power plant components, such as nuclear fuel rod bundles thermal-hydraulics. Presented methodology and obtained CFD results comprise micro-scale phenomena of phases' separation, interface tracking, heated surfaces dry-out and critical heat flux occurrence, as well as macro-scale transport and distributions of phase volumes. (authors)

Stosic, Zoran V. [Framatome ANP GmbH, P.O. Box 3220, 91050 Erlangen (Germany); Stevanovic, Vladimir D. [University of Belgrade, Kraljice Marije 16, 11000 Belgrade, Serbia and Montenegro (Yugoslavia)

2002-07-01T23:59:59.000Z

286

During Phase 3, WIPP  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: Vegetation Proposed Newcatalyst phasesDataTranslocationDiurnalCommitteeDurable Fuel CellDurableMORE- WIPP

287

NGNP PHASE I REVIEW  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Careerlumens_placard-green.eps MoreWSRC-STI-2007-00250This NuclearDepartmentNGNP PHASE I REVIEW NEAC

288

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

DOE Patents [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

289

CHANGING OUR WAYS SCOTLAND'S CLIMATE CHANGE PROGRAMME  

E-Print Network [OSTI]

Introduction 15 Overview of emission trends at sector level 15 Energy sector 18 Transport sector 29 Agriculture, forestry and land use sector 37 Business sector 44 Residential sector 51 Public sector 56 Waste management in light of sound scientific evidence that Scotland's climate will change significantly over the coming

290

Geometric phase of a qubit driven by a phase noise laser under non-Markovian dynamics  

SciTech Connect (OSTI)

Robustness of the geometric phase (GP) with respect to the environmental effects is a basic condition for an effective quantum computation. Here, we study quantitatively the GP of a two-level atom system driven by a phase noise laser under non-Markovian dynamics in terms of different parameters involved in the whole system. We find that with the change of the damping coupling, the GP is very sensitive to its properties exhibiting long collapse and revival phenomena, which play a significant role in enhancing the stabilization and control of the system dynamics. Moreover, we show that the GP can be considered as a tool for testing and characterizing the nature of the qubit–environment coupling. Due to the significance of how a system is quantum correlated with its environment in the construction of a scalable quantum computer, the entanglement dynamics between the qubit with its environment under external classical noise is evaluated and investigated during the time evolution. -- Highlights: •Geometric phase under noise phase laser. •Dynamics of the geometric phase under non-Markovian dynamics in the presence of classical noise. •Solution of master equation of the system in terms atomic inversion. •Nonlocal correlation between the system and its environment under non-Markovianity.

Berrada, K., E-mail: kberrada@ictp.it

2014-01-15T23:59:59.000Z

291

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

292

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

293

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

294

Climate Change and Place  

E-Print Network [OSTI]

ments and infrastructure; water shortages and higher tem-changes will also affect water availability and depriveof mil- lions of people of water. Food security will also be

Rottle, Nancy; Alberti, Marina

2008-01-01T23:59:59.000Z

295

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...

296

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...

297

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

298

Radiological Release Accident Investigation Report - Phase 1...  

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

Radiological Release Accident Investigation Report - Phase 1 Radiation Report Radiological Release Accident Investigation Report - Phase 1 Radiation Report Phase 1 of this accident...

299

Options Study - Phase II  

SciTech Connect (OSTI)

The Options Study has been conducted for the purpose of evaluating the potential of alternative integrated nuclear fuel cycle options to favorably address the issues associated with a continuing or expanding use of nuclear power in the United States. The study produced information that can be used to inform decisions identifying potential directions for research and development on such fuel cycle options. An integrated nuclear fuel cycle option is defined in this study as including all aspects of the entire nuclear fuel cycle, from obtaining natural resources for fuel to the ultimate disposal of used nuclear fuel (UNF) or radioactive wastes. Issues such as nuclear waste management, especially the increasing inventory of used nuclear fuel, the current uncertainty about used fuel disposal, and the risk of nuclear weapons proliferation have contributed to the reluctance to expand the use of nuclear power, even though it is recognized that nuclear power is a safe and reliable method of producing electricity. In this Options Study, current, evolutionary, and revolutionary nuclear energy options were all considered, including the use of uranium and thorium, and both once-through and recycle approaches. Available information has been collected and reviewed in order to evaluate the ability of an option to clearly address the challenges associated with the current implementation and potential expansion of commercial nuclear power in the United States. This Options Study is a comprehensive consideration and review of fuel cycle and technology options, including those for disposal, and is not constrained by any limitations that may be imposed by economics, technical maturity, past policy, or speculated future conditions. This Phase II report is intended to be used in conjunction with the Phase I report, and much information in that report is not repeated here, although some information has been updated to reflect recent developments. The focus in this Options Study was to identify any nuclear fuel cycle technology or option that may result in a significant beneficial impact to the issues as compared to the current U.S. approach of once-through use of nuclear fuel in LWRs or similar reactors followed by direct disposal of UNF. This approach was taken because incremental differences may be difficult to clearly identify and justify due to the large uncertainties that can be associated with the specific causes of the issues. Phase II of this Options Study continued the review of nuclear fuel cycle options that was initiated and documented during Phase I, concentrating on reviewing and summarizing the potential of integrated nuclear fuel cycles. However, based on the reviews of previous studies and available data, it was not always possible to clearly determine sufficiently large differences between the various fuel cycle and technology options for some of the issues or evaluation measures, for example, in cases where only incremental differences with respect to the issues might be achieved regardless of the fuel cycle option or technologies being considered, or where differences were insufficient to clearly rise above the uncertainties.

R. Wigeland; T. Taiwo; M. Todosow; W. Halsey; J. Gehin

2010-09-01T23:59:59.000Z

300

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

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

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

302

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

303

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

304

"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

305

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

306

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

307

Climate change risk and response  

E-Print Network [OSTI]

net impact of climate change on agriculture in California,of Climate Change on California Agriculture. ” PresentationEffects of Climate Change on California Agriculture Positive

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

308

Climate Change and Agriculture Reconsidered  

E-Print Network [OSTI]

2009 Paper 1080 Climate Change and Agriculture Reconsideredby author(s). Climate Change and Agriculture Reconsideredimpact of climate change on agriculture, there still exists

Fisher, Anthony

2009-01-01T23:59:59.000Z

309

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

310

Urban Growth and Climate Change  

E-Print Network [OSTI]

2007a The Economic Impacts of Climate Change: Evidence fromGreenstone. 2007b. Climate Change, Mortality and Adaptation:and Ariel Dinar, 1999, Climate Change, Agriculture, and

Kahn, Matthew E.

2008-01-01T23:59:59.000Z

311

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

312

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

313

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

314

Unusual Phase Behavior of Confined Heavy Water  

E-Print Network [OSTI]

Many of the anomalous properties of water are amplified in the deeply supercooled region. Here we present neutron scattering measurements of the density of heavy water confined in a nanoporous silica matrix MCM-41-S (\\approx15 {\\AA} pore diameter), namely, the equation of state {\\rho}(T,P), in a temperature-pressure range, from 300 K to 130 K and from 1 bar to 2900 bar, where bulk water will crystalize. A sudden change of slope in the otherwise continuous density profile (a "kink") is observed below a certain pressure Pc; however, this feature is absent above Pc. Instead, a hysteresis phenomenon in the density profiles between the warming and cooling scans becomes prominent above Pc. Hence, the data can be interpreted as a line of apparent 2nd-order phase transition at low pressures evolving into a line of 1st-order phase transition at high pressures. If so, the existence of a "tricritical point" at Pc \\approx 1500 bar, Tc \\approx 210 K becomes another possible scenario to explain the exceptionally rich phase behavior of low-temperature confined water.

Yang Zhang; Antonio Faraone; William A. Kamitakahara; Kao-Hsiang Liu; Chung-Yuan Mou; Juscelino B. Leão; Sung Chang; Sow-Hsin Chen

2011-06-21T23:59:59.000Z

315

Multimegawatt space nuclear power supply: Phase 1, Final report  

SciTech Connect (OSTI)

The Phase 2 program objectives are to (1) demonstrate concept feasibility, (2) develop a preliminary design, and (3) complete Phase 3 engineering development and ground test plans. The approach to accomplish these objectives is to prove technical feasibility of our baseline design early in the program while maintaining flexibility to easily respond to changing requirements and advances in technology. This approach recognizes that technology is advancing rapidly while the operational phase MSNPS is 15 to 20 years in the future. This plan further recognizes that the weapons platform and Advanced Launch System (ALS) are in very early program definition stages; consequently, their requirements, interfaces, and technological basis will evolve. This document outlines the Phase 2 plan along with task scheduling of the various program aspects.

Not Available

1989-02-17T23:59:59.000Z

316

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

317

Global distribution of solid and aqueous sulfate aerosols: Effect of the hysteresis of particle phase transitions  

E-Print Network [OSTI]

of dimethylsulfide from the ocean biosphere. The timescale of phase transitions, as driven by changes in relative radiation back to space less effectively [Ramaswamy et al., 2001; Martin et al., 2004; Wang and Martin, 2007

318

Transient liquid-phase infiltration of a powder-metal skeleton  

E-Print Network [OSTI]

Transient Liquid-Phase Infiltration (TLI) is a new method for densifying a powder-metal skeleton that produces a final part of homogeneous composition without significant dimensional change, unlike traditional infiltration ...

Lorenz, Adam Michael, 1974-

2002-01-01T23:59:59.000Z

319

The effects of viscous forces on three-phase relative permeability  

SciTech Connect (OSTI)

The overall objective of Three-Phase Relative Permeability Project (BE9) is to develop guidelines for improving the accuracy of three-phase relative permeability determinations. This report summarizes previous studies and explains the progress made at NIPER on studying the effect of variations in viscous forces on three-phase relative permeabilities by changing the viscosity of both wetting and nonwetting phases. Significant changes were observed due to viscosity variations. An increase in oil viscosity reduced the relative permeability to gas; an increase in brine/(wetting-phase) viscosity reduced the relative permeability to brine. A slight increase in gas relative permeability was also observed. These observations suggest that the viscosities of both oil and water influence three-phase permeability data. During this study, data scatter was sometimes encountered which was comparable to that of published results. The causes of this scatter are outlined in this report and remedial attempts are discussed. 20 refs., 16 figs., 5 tabs.

Maloney, D.R.; Mahmood, S.M.; Honarpour, M.M.

1989-04-01T23:59:59.000Z

320

Phase 1 of the Hanford Environmental Dose Reconstruction Project  

SciTech Connect (OSTI)

The work described in this report was prompted by the public's concern about potential effect from the radioactive materials released from the Hanford Site. The Hanford Environmental Dose Reconstruction (HEDR) Project was established to estimate radiation dose the public might have received from the Hanford Site since 1944, when facilities began operating. Phase 1 of the HEDR Project is a pilot'' or demonstration'' phase. The objectives of this initial phase were to determine whether enough historical information could be found or reconstructed to be used for dose estimation and develop and test conceptual and computational models for calculating credible dose estimates. Preliminary estimates of radiation doses were produced in Phase 1 because they are needed to achieve these objectives. The reader is cautioned that the dose estimates provided in this and other Phase 1 HEDR reports are preliminary. As the HEDR Project continues, the dose estimates will change for at least three reasons: more complete input information for models will be developed; the models themselves will be refined; and the size and shape of the geographic study area will change. This is one of three draft reports that summarize the first phase of the four-phased HEDR Project. This, the Summary Report, is directed to readers who want a general understanding of the Phase 1 work and preliminary dose estimates. The two other reports -- the Air Pathway Report and the Columbia River Pathway Report -- are for readers who understand the radiation dose assessment process and want to see more technical detail. Detailed descriptions of the dose reconstruction process are available in more than 20 supporting reports listed in Appendix A. 32 refs., 46 figs.

Not Available

1991-08-01T23:59:59.000Z

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.


321

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

322

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

323

Changing gender role attitudes  

E-Print Network [OSTI]

, the Netherlands, Italy, Ireland and Spain). Third, the ISSP data pro- vides a sufficient time span (14 years, with surveys in 1988, 1994 and 2002) for the systematic investigation of the underlying causes of attitudinal change. Attitudinal Changes in Great Britain... and Spain. Unfortunately, in both Italy and Spain survey participation was only for two of the three waves, with Italy not participating in 2002 and Spain not participating in 1988. The per- centages reflect the combined attitudes of men and women, although...

Scott, Jacqueline

2008-01-01T23:59:59.000Z

324

SASE FEL at the TESLA Facility, Phase 2 The TESLA Test Facility FEL team  

E-Print Network [OSTI]

SASE FEL at the TESLA Facility, Phase 2 The TESLA Test Facility FEL team June 2002, TESLA-FEL 2002-01 #12;SASE FEL at the TESLA Facility, Phase 2 Abstract The last description of the TESLA Test Facility FEL has been written in 1995 (TESLA- FEL report 95-03). Since then, many changes have developed

325

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

326

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

327

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

328

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...

329

Results of the Gallium-Clad Phase 3 and Phase 4 tasks (canceled prior to completion)  

SciTech Connect (OSTI)

This report summarizes the results of the Gallium-Clad interactions Phase 3 and 4 tasks. Both tasks were to involve examining the out-of-pile stability of residual gallium in short fuel rods with an imposed thermal gradient. The thermal environment was to be created by an electrical heater in the center of the fuel rod and coolant flow on the rod outer cladding. Both tasks were canceled due to difficulties with fuel pellet fabrication, delays in the preparation of the test apparatus, and changes in the Fissile Materials Disposition program budget.

Morris, R.N.

1998-08-01T23:59:59.000Z

330

Electronic properties of ordered quasicrystals and related phases  

SciTech Connect (OSTI)

A study of the electronic properties of the well-order icosahedral (i-) phases and related crystalline and amorphous phases is presented. Barely metallic behavior is observed in the ordered i-crystals, including high resistivities with large temperature coefficients, low electronic densities of states at the Fermi energy, large values of the low-temperature Hall coefficients, and unusual temperature dependences of the Hall coefficients and the thermoelectric powers. Rapid variations of these properties with small changes in composition are observed. Similar behavior is seen in crystalline approximate structures, which are close crystalline analogues of the i-phase. With increasing structural disorder in disordered i-phases and in the totally disordered amorphous (a-) phases, the familiar metallic-glass-like electronic properties are restored. This behavior is due to band structure effects. The high resistivities, low densities of states, and low carrier densities are due to the structural scattering mechanism of the Fermi-surface-Jones-zone interaction, which is enhanced due to the high degree of structural ordering and, in the i-phases, due to the icosahedral symmetry. The unusual temperature dependences of the Hall coefficients and thermoelectric powers, as well as the rapid variation of the electronic properties with small changes in composition, support the existence of a rapidly varying density of states on a fine energy scale, on the order of 26 MeV. The existence of these band structure effects is further supported by the effects of structural disorder on the electronic properties, with disorder restoring the free-electron metallic-glass-like electronic properties. The temperature dependence of the conductivity at high temperatures displays a concave upward curvature in a wide variety of icosahedral, amorphous, and crystalline phases which have high resistivity values.

Biggs, B.D.

1992-01-01T23:59:59.000Z

331

Liquid-phase compositions from vapor-phase analyses  

SciTech Connect (OSTI)

Arsenic normally is not considered to be a contaminant. However, because arsenic was found in many cylinders of UF{sub 6}, including in corrosion products, a study was performed of the distribution of the two arsenic fluorides, AsF{sub 3} and AsF{sub 5}, between liquid and vapor phases. The results of the study pertain to condensation or vaporization of liquid UF{sub 6}. This study includes use of various experimental data plus many extrapolations necessitated by the meagerness of the experimental data. The results of this study provide additional support for the vapor-liquid equilibrium model of J.M. Prausnitz and his coworkers as a means of describing the distribution of various impurities between vapor and liquid phases of UF{sub 6}. Thus, it is concluded that AsF{sub 3} will tend to concentrate in the liquid phase but that the concentration of AsF{sub 5} in the vapor phase will exceed its liquid-phase concentration by a factor of about 7.5, which is in agreement with experimental data. Because the weight of the liquid phase in a condensation operation may be in the range of thousands of times that of the vapor phase, most of any AsF{sub 5} will be in the liquid phase in spite of this separation factor of 7.5. It may also be concluded that any arsenic fluorides fed into a uranium isotope separation plant will either travel with other low-molecular-weight gases or react with materials present in the plant. 25 refs., 3 figs., 6 tabs.

Davis, W. Jr. (Oak Ridge Gaseous Diffusion Plant, TN (USA)); Cochran, H.D. (Oak Ridge National Lab., TN (USA))

1990-02-01T23:59:59.000Z

332

Phase space quantum mechanics - Direct  

SciTech Connect (OSTI)

Conventional approach to quantum mechanics in phase space (q,p), is to take the operator based quantum mechanics of Schroedinger, or an equivalent, and assign a c-number function in phase space to it. We propose to begin with a higher level of abstraction, in which the independence and the symmetric role of q and p is maintained throughout, and at once arrive at phase space state functions. Upon reduction to the q- or p-space the proposed formalism gives the conventional quantum mechanics, however, with a definite rule for ordering of factors of noncommuting observables. Further conceptual and practical merits of the formalism are demonstrated throughout the text.

Nasiri, S.; Sobouti, Y.; Taati, F. [Institute for Advanced Studies in Basic Sciences, Zanjan, 45195-1159 (Iran, Islamic Republic of) and Department of Physics, Zanjan University, Zanjan (Iran); Institute for Advanced Studies in Basic Sciences, Zanjan, 45195-1159 (Iran, Islamic Republic of); Institute for Advanced Studies in Basic Sciences, Zanjan, 45195-1159 (Iran, Islamic Republic of) and Department of Physics, University of Kurdistan, D-78457 Sanadaj (Iran)

2006-09-15T23:59:59.000Z

333

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

334

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

335

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

336

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

337

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...

338

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

339

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

340

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

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

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

342

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

343

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

344

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

345

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

346

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

347

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

348

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

349

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

350

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

351

ENERGY FLOWS CLIMATE CHANGE  

E-Print Network [OSTI]

ENERGY 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" temperature to radiative flux. #12;GLOBAL ENERGY BALANCE Global and annual average energy fluxes in watts per

Schwartz, Stephen E.

352

Global Change Sustainability  

E-Print Network [OSTI]

Global Change and Sustainability Center The GCSC is an inclusionary and interdisciplinary hub that promotes, coordinates, and conducts local to global environmental- and sustainability-related research to complex environmental and sustainability issues and challenges. 2012 Annual Report #12;1GCSC 2012 ANNUAL

Tipple, Brett

353

Phase transformation and growth of hygroscopic aerosols  

SciTech Connect (OSTI)

Ambient aerosols play an important role in many atmospheric processes affecting air quality, visibility degradation, and climatic changes as well. Both natural and anthropogenic sources contribute to the formation of ambient aerosols, which are composed mostly of sulfates, nitrates, and chlorides in either pure or mixed forms. These inorganic salt aerosols are hygroscopic by nature and exhibit the properties of deliquescence and efflorescence in humid air. For pure inorganic salt particles with diameter larger than 0.1 micron, the phase transformation from a solid particle to a saline droplet occurs only when the relative humidity in the surrounding atmosphere reaches a certain critical level corresponding to the water activity of the saturated solution. The droplet size or mass in equilibrium with relative humidity can be calculated in a straightforward manner from thermodynamic considerations. For aqueous droplets 0.1 micron or smaller, the surface curvature effect on vapor pressure becomes important and the Kelvin equation must be used.

Tang, I.N.

1999-11-01T23:59:59.000Z

354

Phases and Structures of Interstellar Gas  

E-Print Network [OSTI]

The thermal and chemical phases of the cool component of interstellar gas are discussed. Variations with galactocentric radius and from galaxy to galaxy are mostly the result of changes in the ambient interstellar pressure and radiation field. Interstellar structure that is hierarchical or fractal in the cloudy parts and has large and connected empty regions between these clouds is probably the result of turbulence. Such structure opens up the disk to the transmission of OB star light into the halo, and it provides for a diffuse ionized component that tapers away gradually from each dense HII region. Fractal cloud structure may also produce the cloud and clump mass functions, and perhaps even the star cluster mass function.

B. Elmegreen

1999-06-12T23:59:59.000Z

355

Citrus limonoids: seasonal changes and their potential in glutathione S-transferase induction  

E-Print Network [OSTI]

Seasonal changes of citrus limonids in 'Rio Red' grapefruit were investigated using reverse phase high performance liquid chromatography (HPLC). Several citrus limonoids, limonoid mixtures and a flavonone were evaluated for their ability to induce...

Li, Jiaxing

2002-01-01T23:59:59.000Z

356

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

357

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:...

358

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

359

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

360

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

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

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; Ødegården, Torgeir Bryge; Skjetne, Erik; Hansen, Alex; 10.1103/PhysRevE.84.037303

2012-01-01T23:59:59.000Z

362

Climate change risk and response  

E-Print Network [OSTI]

the Potential Consequences of Climate Variability and Changeand Kate Scow. 2006. “Climate Change: Page 117 ChallengesLandscapes. ” California Climate Change Center White Paper.

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

363

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...

364

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.

365

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

366

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

367

Phase measurement system using a dithered clock  

DOE Patents [OSTI]

A phase measurement system is disclosed which measures the phase shift between two signals by dithering a clock signal and averaging a plurality of measurements of the phase differences between the two signals. 8 figures.

Fairley, C.R.; Patterson, S.R.

1991-05-28T23:59:59.000Z

368

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

369

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

370

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

371

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

372

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

373

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

374

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

375

Integrated monitoring and surveillance system demonstration project: Phase I accomplishments  

SciTech Connect (OSTI)

The authors present the results of the Integrated Monitoring and Surveillance System (IMSS) demonstration project Phase I efforts. The rationale behind IMSS development is reviewed and progress in each of the 5 basic tasks is detailed. Significant results include decisions to use Echelon LonWorks networking protocol and Microsoft Access for the data system needs, a preliminary design for the plutonium canning system glovebox, identification of facilities and materials available for the demonstration, determination of possibly affected facility documentation, and a preliminary list of available sensor technologies. Recently imposed changes in the overall project schedule and scope are also discussed and budgetary requirements for competition of Phase II presented. The results show that the IMSS demonstration project team has met and in many cases exceeded the commitments made for Phase I deliverables.

Aumeier, S.E.; Walters, B.G.; Crawford, D.C. [and others

1997-01-15T23:59:59.000Z

376

Inverse operator representations of quantum phase  

E-Print Network [OSTI]

We define quantum phase in terms of inverses of annihilation and creation operators. We show that like Susskind - Glogower phase operators, the measured phase operators and the unitary phase operators can be defined in terms of the inverse operators. However, for the unitary phase operator the Hilbert space includes the negative energy states. The quantum phase in inverse operator representation may find the applications in the field of quantum optics particularly in the squeezed states.

G. M. Saxena

2008-03-14T23:59:59.000Z

377

Phase 2 Rebaseline Report for Tank Farm Restoration and Safe Operations Project W-314  

SciTech Connect (OSTI)

Project W-314, (97-D-402) Tank Farm Restoration and Safe Operations is a multi-year, multiphase project established to upgrade selected 200 East and West Area Tank Farms to support the long-term mission of waste storage, retrieval, and transfer for vitrification. Key drivers for these upgrades include the planned timetable for transfer of waste to the privatized vitrification facility, regulatory compliance requirements (i.e., Washington State and Federal Regulations), and the Tri-Party Agreement (TPA). The previous baseline scope for Project W-314 was established based upon tank farm system assessments performed five to six years ago and was reflected in the previous baseline cost estimate, the Accelerated Replanning Estimate, completed in July 1997. The Accelerated Replanning Estimate splits the project into two phases: Phase 1 provides upgrades necessary to assure reliable waste retrieval and transfer to the anticipated vitrification plant. Phase 2 provides upgrades to selected primary and annulus tank farm ventilation systems that are required for compliant waste transfer, as well as other compliance-based upgrades to existing River Protection Project (WP) facilities and systems. The Accelerated Replanning Estimate provided the basis for Baseline Change Request TWR 97-066, which identified Phases 1 and 2 as $95 million and $206.5 million, respectively. Following completion of the Accelerated Replanning Estimate, several changes occurred that prompted a decision to rebaseline Phase 1, and subsequently Phase 2. Paramount among these was the delay in the Privatization schedule (90% case), lessons learned (in the year since the Accelerated Planning Report had been completed), and the adoption of an alternate waste transfer system route. The rebaselined cost of phase 1, $157 million, was substantially higher than the Accelerated Replanning Estimate for a number of reasons more thoroughly discussed in the Phase 1 Rebaseline Report, HNF-3781, January 1999. Since the July 1997 Accelerated Replanning Estimate there have also been changes to the tank farm authorization basis and Programmatic needs. For example, Tank Farm Operations has been installing new Continuous Air Monitors (CAMS) and liquid level measuring devices in order to achieve desired monitoring improvements years earlier than provided by Phase 2. In summary, the decision to rebaseline Phase 2 was prompted by: (1) the shifting of selected Phase 2 scope to Phase 1 during the Phase 1 rebaselining, (2) changes in the authorization basis, (3) programmatic needs, and (4) the dated nature of the existing scope definition. Figure 1.1 presents a summary of the key changes born the previous baseline and their collective impact on the cost of Phase 2.

LENTSCH, J.W.

2000-03-27T23:59:59.000Z

378

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

379

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

380

The Bridges of Social Change  

E-Print Network [OSTI]

between disciplines to create new solutions and promote social change. Masthead RICHARD J. GELLES, PH

Sharp, Kim

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

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

382

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

383

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

384

Climatic Change An Interdisciplinary, International  

E-Print Network [OSTI]

climate and cultural changes are observed in the Eastern Mediterranean and the Near East [e.g., Bookman et1 23 Climatic Change An Interdisciplinary, International Journal Devoted to the Description, Causes and Implications of Climatic Change ISSN 0165-0009 Volume 112 Combined 3-4 Climatic Change (2012) 112:769-789 DOI

Gvirtzman, Haim

385

Potential Impacts of CLIMATE CHANGE  

E-Print Network [OSTI]

Potential Impacts of CLIMATE CHANGE on U.S. Transportation Potential Impacts of CLIMATE CHANGE on U.S. Transportation TRANSPORTATION RESEARCH BOARD SPECIAL REPORT 290 #12;#12;Committee on Climate Change and U Washington, D.C. 2008 www.TRB.org Potential Impacts of CLIMATE CHANGE on U.S. Transportation TRANSPORTATION

Sheridan, Jennifer

386

Phase Transformations in Confined Nanosystems  

SciTech Connect (OSTI)

This project discovered that non-equilibrium structures, including chemically ordered structures not observed in bulk systems, form in isolated nanoscale systems. Further, a generalized model was developed that effectively explained the suppression of equilibrium phase transformations. This thermodynamic model considered the free energy decrease associated with the phase transformation was less than the increase in energy associated with the formation of an interphase interface, therefore inhibiting the phase transformation. A critical diameter exists where the system transitions to bulk behavior, and a generalized equation was formulated that successfully predicted this transition in the Fe-Au system. This provided and explains a new route to novel structures not possible in bulk systems. The structural characterization was accomplished using transmission electron microscopy in collaboration with Matthew Kramer of Ames Laboratory. The PI and graduate student visited Ames Laboratory several times a year to conduct the experiments.

Shield, Jeffrey E. [Department of Mechanical & Materials Engineering] [Department of Mechanical & Materials Engineering; Belashchenko, Kirill [Department of Physics & Astronomy] [Department of Physics & Astronomy

2014-04-29T23:59:59.000Z

387

Geometric phase in Stückelberg interferometry  

E-Print Network [OSTI]

We study the time evolution of a two-dimensional quantum particle exhibiting an energy spectrum, made of two bands, with two Dirac cones, as e.g. in the band structure of a honeycomb lattice. A force is applied such that the particle experiences two Landau-Zener transitions in succession. The adiabatic evolution between the two transitions leads to St\\"uckelberg interferences, due to two possible trajectories in energy space. In addition to well-known dynamical and Stokes phases, the interference pattern reveals a geometric phase which depends on the chirality (winding number) and the mass sign associated to each Dirac cone, as well as on the type of trajectory (parallel or diagonal with respect to the two cones) in parameter space. This geometric phase reveals the coupling between the bands encoded in the structure of the wavefunctions.

Lih-King Lim; Jean-Noël Fuchs; Gilles Montambaux

2014-12-18T23:59:59.000Z

388

Berry's phases and topological properties in the Born-Oppenheimer approximation  

E-Print Network [OSTI]

The level crossing problem is neatly formulated by the second quantized formulation, which exhibits a hidden local gauge symmetry. The analysis of geometric phases is reduced to a simple diagonalization of the Hamiltonian. 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 topological proof of the Longuet-Higgins' phase-change rule, for example, thus fails in the practical Born-Oppenheimer approximation where $T$ is identified with the period of the slower system. The crucial difference between the Aharonov-Bohm phase and the geometric phase is explained. It is also noted that the gauge symmetries involved in the adiabatic and non-adiabatic geometric phases are quite different.

Kazuo Fujikawa

2005-10-07T23:59:59.000Z

389

Pressure-induced Phase Transition in Thiol-capped CdTe Nanoparticles  

SciTech Connect (OSTI)

Phase transitions for CdTe nanoparticles (NPs) under high pressure up to 37.0 GPa have been studied using fluorescence measurements. The phase transition from cinnarbar to rocksalt phase has been observed in CdTe NPs solution at 5.8 GPa, which is much higher than the phase transition pressure of bulk CdTe (3.8 GPa) and that of CdTe NPs in solid form (0.8 GPa). CdTe NPs solution therefore shows elevated phase transition pressure and enhanced stability against pressure compared with bulk CdTe and CdTe NPs in solid forms. The enhanced stability of CdTe NPs solution has been attributed to possible shape change in the phase transition and/or inhomogeneous strains in nanoparticle solutions.

Wu, F; Zaug, J; Young, C; Zhang, J Z

2006-11-29T23:59:59.000Z

390

Kinetics of the [beta]-[delta]phase transition in PBX9501.  

SciTech Connect (OSTI)

The initial step in the thermal decomposition of HMX is the solid state phase transition from the centrosymmetric beta form to the noncentrosymmetric delta form. The symmetry change makes the phase transition amenable to the application of second harmonic generation (SHG) as a probe of transition kinetics. We have used SHG to study the temperature dependence of the kinetics for unconfined PBX9501 and HMX. Spatially resolved SHG measurements have shown a nucleation and growth mechanism for the solid state phase transition. We have measured the transition rate as a function of temperature in order to obtain the activation energy and entropy of transition, which determine the phase transition kinetics. Additionally, we have observed temperature dependent reversion of the delta phase to beta phase and have fimd that we can control the reversion rate by controlling the cooling.

Smilowitz, L. B. (Laura B.); Henson, B. F. (Bryan F.); Asay, B. W. (Blaine W.); Dickson, P. M. (Peter M.); Robinson, J. M. (Jeanne M.)

2001-01-01T23:59:59.000Z

391

Phase appearance or disappearance in two-phase flows  

E-Print Network [OSTI]

in a large variety of industrial or natural systems involving boiling or condensing fluids, reacting flows-phase flows. Such models have crucial importance in many industrial areas such as nuclear power plant safety considered. Numerical results are presented which demonstrate the efficiency of the proposed solutions. Key

Boyer, Edmond

392

Protein phase feeding of poultry  

E-Print Network [OSTI]

PROTEIN PHASE FEEDING OF POULTRY A Thesis By Larry Rufus Vest Submitted to the Graduate College of the Texas AM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE January 1966 Major Subject Poultry... Science PROTEIN PHASE FEEDING OF POULTRY A Thesis Larry Rufus Vest Approved as to style and content by: man o o x tee par e em e e er January 1966 ACKNOWLEDGE MENTS Tbe author wishes to express his sincere gratitude and deep appreciation to Dr...

Vest, Larry Rufus

1966-01-01T23:59:59.000Z

393

Climate change cripples forests  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-Series to User Group and Userof aChristinaCliff joins EMSLClimateClimate Change

394

CONFIGURATION CHANGE PROPOSAL (CCP)  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTie Ltd:June 2015 <Ones |Laboratory, JuneDid y ou know mostChange

395

Phase Errors and the Capture Effect  

SciTech Connect (OSTI)

This slide-show presents analysis of spectrograms and the phase error of filtered noise in a signal. When the filtered noise is smaller than the signal amplitude, the phase error can never exceed 90{deg}, so the average phase error over many cycles is zero: this is called the capture effect because the largest signal captures the phase and frequency determination.

Blair, J., and Machorro, E.

2011-11-01T23:59:59.000Z

396

Linear phase distribution of acoustical vortices  

SciTech Connect (OSTI)

Linear phase distribution of phase-coded acoustical vortices was theoretically investigated based on the radiation theory of point source, and then confirmed by experimental measurements. With the proposed criterion of positive phase slope, the possibility of constructing linear circular phase distributions is demonstrated to be determined by source parameters. Improved phase linearity can be achieved at larger source number, lower frequency, smaller vortex radius, and/or longer axial distance. Good agreements are observed between numerical simulations and measurement results for circular phase distributions. The favorable results confirm the feasibility of precise phase control for acoustical vortices and suggest potential applications in particle manipulation.

Gao, Lu; Zheng, Haixiang [Key Laboratory of Optoelectronics of Jiangsu Province, School of Physics Science and Technology, Nanjing Normal University, 1 Wenyuan Road, Xianlin District, Nanjing 210023 (China); Ma, Qingyu, E-mail: maqingyu@njnu.edu.cn [Key Laboratory of Optoelectronics of Jiangsu Province, School of Physics Science and Technology, Nanjing Normal University, 1 Wenyuan Road, Xianlin District, Nanjing 210023 (China); Laboratory of Modern Acoustics of MOE, Nanjing University, Nanjing 210093 (China); Tu, Juan; Zhang, Dong [Laboratory of Modern Acoustics of MOE, Nanjing University, Nanjing 210093 (China)

2014-07-14T23:59:59.000Z

397

Representation of noncommutative phase space  

E-Print Network [OSTI]

The representations of the algebra of coordinates and momenta of noncommutative phase space are given. We study, as an example, the harmonic oscillator in noncommutative space of any dimension. Finally the map of Sch$\\ddot{o}$dinger equation from noncommutative space to commutative space is obtained.

Kang Li; Jianhua Wang; Chiyi Chen

2005-08-16T23:59:59.000Z

398

Phase and birefringence aberration correction  

DOE Patents [OSTI]

A Brillouin enhanced four wave mixing phase conjugate mirror corrects phase aberrations of a coherent electromagnetic beam and birefringence induced upon that beam. The stimulated Brillouin scattering (SBS) phase conjugation technique is augmented to include Brillouin enhanced four wave mixing (BEFWM). A seed beam is generated by a main oscillator which arrives at the phase conjugate cell before the signal beams in order to initiate the Brillouin effect. The signal beam which is being amplified through the amplifier chain is split into two perpendicularly polarized beams. One of the two beams is chosen to be the same polarization as some component of the seed beam, the other orthogonal to the first. The polarization of the orthogonal beam is then rotated 90.degree. such that it is parallel to the other signal beam. The three beams are then focused into cell containing a medium capable of Brillouin excitation. The two signal beams are focused such that they cross the seed beam path before their respective beam waists in order to achieve BEFWM or the two signal beams are focused to a point or points contained within the focused cone angle of the seed beam to achieve seeded SBS, and thus negate the effects of all birefringent and material aberrations in the system.

Bowers, Mark (Modesto, CA); Hankla, Allen (Livermore, CA)

1996-01-01T23:59:59.000Z

399

Berry phase effects on electronic properties Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge,  

E-Print Network [OSTI]

Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA Ming-Che Chang Department of PhysicsBerry phase effects on electronic properties Di Xiao Materials Science and Technology Division, Oak

Wu, Zhigang

400

Idaho Water Rental Pilot Project Probability/Coordination Study Resident Fish and Wildlife Impacts Phase III, 1997 Annual Report.  

SciTech Connect (OSTI)

Phase III began in 1995 with the overall goal of quantifying changes in resident fish habitat in the Snake River Basin upstream of Brownlee Reservoir resulting from the release of salmon flow augmentation water.

Leitzinger, Eric J. (Idaho Department of Fish and Game, Boise, ID)

1998-10-01T23:59:59.000Z

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.


401

Phase  

E-Print Network [OSTI]

-MeOH method; Saka process) for biodiesel fuel production. Even though the Saka process could produce high

Shiro Saka; Esterification Biodiesel; Methanol Recovery

402

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

403

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

404

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

405

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

406

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...

407

Quantum phases and dynamics of geometric phase in a quantum spin chain system under linear quench  

E-Print Network [OSTI]

We study the quantum phases of anisotropic XY spin chain system in presence and absence of adiabatic quench. A connection between geometric phase and criticality is established from the dynamical behaviour of the geometric phase for a quench induced quantum phase transition in a quantum spin chain. We predict XX criticality associated with a sequence of non-contractible geometric phases.

Sujit Sarkar; B. Basu

2011-09-11T23:59:59.000Z

408

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

409

CLIMATE CHANGE IMPACTS, VULNERABILITIES, AND  

E-Print Network [OSTI]

CLIMATE CHANGE IMPACTS, VULNERABILITIES, AND ADAPTATION IN THE SAN FRANCISCO BAY AREA Commission's California Climate Change Center JULY 2012 CEC5002012071 Prepared for: California Energy, as well as projections of future changes in climate based on modeling studies using various plausible

410

Biological Impacts of Climate Change  

E-Print Network [OSTI]

Biological Impacts of Climate Change John P McCarty, University of Nebraska at Omaha, Omaha, NE and reproduction depend on how well adapted individuals are to local climate patterns. Climate change can disrupt subsequent impacts on populations or species' distributions across geographic regions. Climate change may

McCarty, John P.

411

Climate Change Action Plan Report  

E-Print Network [OSTI]

Climate Change Action Plan Report Intermountain Region 2013 National Park Service Resource Stewardship and Science Landscape Conservation and Climate Change Division #12;About this Report Each National Park Service is responding to the challenge of climate change; and (2) raise awareness among NPS

Hansen, Andrew J.

412

4, 28752899, 2007 Climate change  

E-Print Network [OSTI]

HESSD 4, 2875­2899, 2007 Climate change impact and model inaccuracy P. Droogers et al. Title Page are under open-access review for the journal Hydrology and Earth System Sciences Climate change impact­2899, 2007 Climate change impact and model inaccuracy P. Droogers et al. Title Page Abstract Introduction

Paris-Sud XI, Université de

413

PI & Project Team PAF Changes  

E-Print Network [OSTI]

Proposal Management PI & Project Team PAF Changes Step-By-Step Procedures Last updated: 4/1/2013 1 of 10 http://eresearch.umich.edu PAF Changes This procedure details how the PI & Project Team can: Make Management PI & Project Team PAF Changes Step-By-Step Procedure Last updated: 4/1/2013 3 of 10 http

Shyy, Wei

414

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.

415

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

416

Geometric phase of a central spin coupled to an antiferromagnetic environment  

E-Print Network [OSTI]

Using the spin-wave approximation, we study the geometric phase (GP) of a central spin (signal qubit) coupled to an antiferromagnetic (AF) environment under the application of an external global magnetic field. The external magnetic field affects the GP of the qubit directly and also indirectly through its effect on the AF environment. We find that when the applied magnetic field is increased to the critical magnetic field point, the AF environment undergoes a spin-flop transition, a first-order phase transition, and at the same time the GP of the qubit changes abruptly to zero. This sensitive change of the GP of a signal qubit to the parameter change of a many-body environment near its critical point may serve as another efficient tool or witness to study the many-body phase transition. The influences of the AF environment temperature and crystal anisotropy field on the GP are also investigated.

Xiao-Zhong Yuan; Hsi-Sheng Goan; Ka-Di Zhu

2010-03-05T23:59:59.000Z

417

Thermophysical properties of coexistent phases of plutonium  

SciTech Connect (OSTI)

Plutonium is the element with the greatest number of allotropic phases. Thermally induced transformations between these phases are typically characterized by thermal hysteresis and incomplete phase reversion. With Ga substitutal in the lattice, low symmetry phases are replaced by a higher symmetry phase. However, the low temperature Martensitic phase transformation ({delta} {yields} {alpha}{prime}) in Ga stabilized {delta}-phase Pu is characterized by a region of thermal hysteresis which can reach 200 C in extent. These regions of thermal hysteresis offer a unique opportunity to study thermodynamics in inhomogeneous systems of coexistent phases. The results of thermophysical properties measured for samples of inhomogeneous unalloyed and Ga alloyed Pu will be discussed and compared with similar measurements of their single phase constituents.

Freibert, Franz J [Los Alamos National Laboratory; Mitchell, Jeremy N [Los Alamos National Laboratory; Saleh, Tarik A [Los Alamos National Laboratory; Schwartz, Dan S [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

418

Fiber bundle phase conjugate mirror  

DOE Patents [OSTI]

An improved method and apparatus for passively conjugating the phases of a distorted wavefronts resulting from optical phase mismatch between elements of a fiber laser array are disclosed. A method for passively conjugating a distorted wavefront comprises the steps of: multiplexing a plurality of probe fibers and a bundle pump fiber in a fiber bundle array; passing the multiplexed output from the fiber bundle array through a collimating lens and into one portion of a non-linear medium; passing the output from a pump collection fiber through a focusing lens and into another portion of the non-linear medium so that the output from the pump collection fiber mixes with the multiplexed output from the fiber bundle; adjusting one or more degrees of freedom of one or more of the fiber bundle array, the collimating lens, the focusing lens, the non-linear medium, or the pump collection fiber to produce a standing wave in the non-linear medium.

Ward, Benjamin G.

2012-05-01T23:59:59.000Z

419

Is the beta phase maximal?  

SciTech Connect (OSTI)

indicates that 2|Vub / Vcb/ Vus| = (1-z) with z given by z = 0.19 +(-) 0.14. This fact implies that irrespective of the form of the quark Yukawa matrices, the measured value of the SM CP phase beta is approximately the maximum allowed by the measured absolute values of the CKM elements. This is beta = pi/6 - z/sqrt{3} for gamma = pi/3 + z/sqrt{3}, which implies alpha = pi/2. Alternatively, assuming that beta is exactly maximal and using the experimental measurement, sin(2beta) = 0.726+(-) 0.037, the phase gamma is predicted to be gamma = pi/2 - beta = 66.3 +(-) 1.7. The maximality of beta, if confirmed by the near-future experiments, may give us some clues as to the origin of CP violation.

Ferrandis, Javier; Ferrandis, Javier

2005-04-20T23:59:59.000Z

420

Coherent Phase Argument for Inflation  

E-Print Network [OSTI]

Cosmologists have developed a phenomenally successful picture of structure in the universe based on the idea that the universe expanded exponentially in its earliest moments. There are three pieces of evidence for this exponential expansion -- {\\it inflation} -- from observations of anisotropies in the cosmic microwave background. First, the shape of the primordial spectrum is very similar to that predicted by generic inflation models. Second, the angular scale at which the first acoustic peak appears is consistent with the flat universe predicted by inflation. Here I describe the third piece of evidence, perhaps the most convincing of all: the phase coherence needed to account for the clear peak/trough structure observed by the WMAP satellite and its predecessors. I also discuss alternatives to inflation that have been proposed recently and explain how they produce coherent phases.

Scott Dodelson

2003-09-05T23:59:59.000Z

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.


421

Light-driven phase shifter  

DOE Patents [OSTI]

A light-driven phase shifter is provided for modulating a transmission light beam. A gaseous medium such as argon is provided with electron energy states excited to populate a metastable state. A tunable dye laser is selected with a wavelength effective to deplete the metastable electron state and may be intensity modulated. The dye laser is directed through the gaseous medium to define a first optical path having an index of refraction determined by the gaseous medium having a depleted metastable electron state. A transmission laser beam is also directed through the gaseous medium to define a second optical path at least partially coincident with the first optical path. The intensity of the dye laser beam may then be varied to phase modulate the transmission laser beam.

Early, James W. (Los Alamos, NM)

1990-01-01T23:59:59.000Z

422

Agent review phase one report.  

SciTech Connect (OSTI)

This report summarizes the findings for phase one of the agent review and discusses the review methods and results. The phase one review identified a short list of agent systems that would prove most useful in the service architecture of an information management, analysis, and retrieval system. Reviewers evaluated open-source and commercial multi-agent systems and scored them based upon viability, uniqueness, ease of development, ease of deployment, and ease of integration with other products. Based on these criteria, reviewers identified the ten most appropriate systems. The report also mentions several systems that reviewers deemed noteworthy for the ideas they implement, even if those systems are not the best choices for information management purposes.

Zubelewicz, Alex Tadeusz; Davis, Christopher Edward; Bauer, Travis LaDell

2009-12-01T23:59:59.000Z

423

A study on the effects of parasitic packaging on diode digital phase shifters  

E-Print Network [OSTI]

A STUDY ON THE EFFECTS OF PARASITIC PACKAGING ON DIODE DIGITAL PHASE SHIFTERS A Thesis bv JERRY SWIE THANG BONG Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree oi MASTER... OF SCIENCE December 198i Major Subject: Electrical Engineering A STUDY ON THE EFFECTS OF PARASITIC PACKAGING ON DIODE DIGITAL PHASE SHIFTERS A Thesis by JERRY STEVIE THANG BONG Approved as to style snd content by: Kai Chang (Co-Chairman of Committee...

Bong, Jerry Swie Thang

2012-06-07T23:59:59.000Z

424

Performance monitoring for new phase dynamic optimization of instruction dispatch cluster configuration  

DOE Patents [OSTI]

In a processor having multiple clusters which operate in parallel, the number of clusters in use can be varied dynamically. At the start of each program phase, the configuration option for an interval is run to determine the optimal configuration, which is used until the next phase change is detected. The optimum instruction interval is determined by starting with a minimum interval and doubling it until a low stability factor is reached.

Balasubramonian, Rajeev (Sandy, UT); Dwarkadas, Sandhya (Rochester, NY); Albonesi, David (Ithaca, NY)

2012-01-24T23:59:59.000Z

425

Phase comparator apparatus and method  

DOE Patents [OSTI]

This invention finds especially useful application for interferometer measurements made in plasma fusion devices (e.g., for measuring the line integral of electron density in the plasma). Such interferometers typically use very high intermediate frequencies (e.g., on the order of 10 to 70 MHz) and therefore the phase comparison circuitry should be a high speed circuit with a linear transfer characteristic so as to accurately differentiate between small fractions of interference fringes.

Coffield, F.E.

1985-02-01T23:59:59.000Z

426

Confined Cubic Blue Phases under Shear  

E-Print Network [OSTI]

We study the behaviour of confined cubic blue phases under shear flow via lattice Boltzmann simulations. We focus on the two experimentally observed phases, blue phase I and blue phase II. The disinclination network of blue phase II continuously breaks and reforms under shear, leading to an oscillatory stress response in time. The oscillations are only regular for very thin samples. For thicker samples, the shear leads to a "stick-slip" motion of part of the network along the vorticity direction. Blue phase I responds very differently: its defect network undergoes seemingly chaotic rearrangements under shear, irrespective of system size.

O. Henrich; K. Stratford; D. Marenduzzo; P. V. Coveney; M. E. Cates

2012-03-14T23:59:59.000Z

427

Ponderomotive phase plate for transmission electron microscopes  

DOE Patents [OSTI]

A ponderomotive phase plate system and method for controllably producing highly tunable phase contrast transfer functions in a transmission electron microscope (TEM) for high resolution and biological phase contrast imaging. The system and method includes a laser source and a beam transport system to produce a focused laser crossover as a phase plate, so that a ponderomotive potential of the focused laser crossover produces a scattering-angle-dependent phase shift in the electrons of the post-sample electron beam corresponding to a desired phase contrast transfer function.

Reed, Bryan W. (Livermore, CA)

2012-07-10T23:59:59.000Z

428

Phase diagram of chiral and diquark condensates at finite temperature and density in the 2-dimensional Gross Neveu model  

E-Print Network [OSTI]

We construct the phase diagram of the chiral and diquark condensates at finite temperature and density in the 1+1 dimensional (2D) two flavor massless Gross Neveu model. The resultant phase diagram shows (I) the chiral condensed phase at low temperature and density, (II) the diquark condensed phase at low temperature and high density, and (III) the chiral and diquark coexisting phase at low temperature and intermediate density. This phase structure is also seen in the 3D Gross Neveu model and the 4D Nambu Jona-Lasinio (NJL) model. Thus the phase diagrams of the chiral and diquark condensates in the NJL-type models do not change qualitatively in 2D, 3D and 4D.

Hiroaki Kohyama

2008-04-30T23:59:59.000Z

429

Berry phase and Hannay's angle in a quantum-classical hybrid system  

SciTech Connect (OSTI)

The Berry phase, which was discovered more than two decades ago, provides very deep insight into the geometric structure of quantum mechanics. Its classical counterpart, Hannay's angle, is defined if closed curves of action variables return to the same curves in phase space after a time evolution. In this paper we study the Berry phase and Hannay's angle in a quantum-classical hybrid system under the Born-Oppenheimer approximation. By the term quantum-classical hybrid system, we mean a composite system consists of a quantum subsystem and a classical subsystem. The effects of subsystem-subsystem couplings on the Berry phase and Hannay's angle are explored. The results show that the Berry phase has been changed sharply by the couplings, whereas the couplings have a small effect on the Hannay's angle.

Liu, H. D.; Wu, S. L.; Yi, X. X. [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China)

2011-06-15T23:59:59.000Z

430

The Michigan regulatory incentives study for electric utilities. Phase 1, Final report  

SciTech Connect (OSTI)

This is the final report of Phase I of the Michigan Regulatory Incentives Study for Electric Utilities, a three-phase review of Michigan`s regulatory system and its effects on resource selection by electric utilities. The goal of Phase I is to identify and analyze financial incentive mechanisms that encourage selection of resources in accord with the principles of integrated resource planning (IRP) or least-cost planning (LCP). Subsequent study phases will involve further analysis of options and possibly a collaborative formal effort to propose regulatory changes. The Phase I analysis proceeded in three steps: (1) identification and review of existing regulatory practices that affect utilities; selection of resources, particularly DSM; (2) preliminary analysis of ten financial mechanisms, and selection of three for further study; (3) detailed analysis of the three mechanisms, including consideration of how they could be implemented in Michigan and financial modeling of their likely impacts on utilities and ratepayers.

Reid, M.W.; Weaver, E.M. [Barakat and Chamberlin, Inc., Oakland, CA (United States)] [Barakat and Chamberlin, Inc., Oakland, CA (United States)

1991-06-17T23:59:59.000Z

431

Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells  

SciTech Connect (OSTI)

We show that the quantum spin Hall (QSH) effect, a state of matter with topological properties distinct from those of conventional insulators, can be realized in mercury telluride-cadmium telluride semiconductor quantum wells. When the thickness of the quantum well is varied, the electronic state changes from a normal to an 'inverted' type at a critical thickness d{sub c}. We show that this transition is a topological quantum phase transition between a conventional insulating phase and a phase exhibiting the QSH effect with a single pair of helical edge states. We also discuss methods for experimental detection of the QSH effect.

Bernevig, A.

2010-03-02T23:59:59.000Z

432

Analytically expressed constraint on two Majorana phases in neutrinoless double beta decay  

E-Print Network [OSTI]

We assume that neutrinoless double beta decay is caused by the exchange of three light Majorana neutrinos. Under this assumption, we obtain, by the method of perturbation, the equation representing the isocontour of effective Majorana mass which is the function of two CP-violating Majorana phases. The equation representing the isocontour (constraint equation between two Majorana phases) is expressed analytically by six parameters: two lepton mixing angles, two kinds of neutrino mass squared differences, lightest neutrino mass scale, and the effective Majorana mass. We discuss how the constraint equation between two Majorana phases changes when the lightest neutrino mass scale is varied.

Maedan, Shinji

2014-01-01T23:59:59.000Z

433

Optical phase and the ionization-dissociation dynamics of excited H{sub 2}  

SciTech Connect (OSTI)

We investigate the influence of optical phase on the dynamics of hydrogen molecules excited to a spectral region with competition between predominantly rotational ionization, and dissociation. We show that an appropriate choice of optical phase changes the relative timing of the ionization and dissociation. Furthermore, the temporal width of the ionization and dissociation fluxes can also be controlled, in a matter-wave analogy of transform-limited optical pulses. The close link between the optical phase and the photoinduced electronic and molecular dynamics has important implications for femtochemistry.

Kirrander, A.; Fielding, H. H. [Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ (United Kingdom); Jungen, Ch. [Laboratoire Aime Cotton du CNRS, Universite de Paris-Sud, 91405 Orsay (France)

2010-01-14T23:59:59.000Z

434

DNS and LES of two-phase flows with cavitation  

E-Print Network [OSTI]

We report on recent progress in the physical and numerical modeling of compressible two-phase flows that involve phase transition between the liquid and gaseous state of the fluid. The high-speed dynamics of cavitation bubbles is studied in well-resolved simulations (DNS) with a sharp-interface numerical model on a micro scale. The underlying assumption of the employed evaporation/condensation model is that phase change occurs in thermal non-equilibrium and that the associated timescale is larger than that of the wave dynamics. Results for the collapse of a spherical vapor bubble close to a solid wall are discussed for three different bubble-wall configurations. The major challenge for such numerical investigations is to accurately reproduce the dynamics of the interface between liquid and vapor during the entire collapse process, including the high-speed dynamics of the late stages, where compressibility of both phases plays a decisive role. Direct interface resolving simulations are intractable for real wor...

Hickel, Stefan

2014-01-01T23:59:59.000Z

435

Thermodynamics of the ferromagnetic phase transition in nearly half metallic CoS2 at high pressures  

SciTech Connect (OSTI)

The volume change and heat capacity at the ferromagnetic phase transition in COS2 were measured at high pressures using X-rays generated by the Argonne synchrotron light source and by ac-calorimetry, respectively. The transition entropy, calculated on the basis of these experimental data, drops along the transition line due to quantum degradation, as required by Nernst's law. The volume change increases strongly along the transition line, which is explained by specifics of the compressibility difference of coexisting phases that results from nearly half metallic nature of the ferromagnetic phase of COS2. (C) 2013 Elsevier Ltd. All rights reserved.

Elkin, F. S. [Institute for High Pressure Physics of Russian Academy of Sciences; Zibrov, I. P. [Institute for High Pressure Physics of Russian Academy of Sciences; Novikov, A. P. [Institute for High Pressure Physics of Russian Academy of Sciences; Khasanov, S. S. [Institute for Solid State Physics Russian Academy of Sciences; Sidorov, V. A. [Institute for High Pressure Physics of Russian Academy of Sciences; Petrova, A. E. [Institute for High Pressure Physics of Russian Academy of Sciences; Lograsso, Thomas A. [Ames Laboratory; Thompson, J. D. [Los Alamos National Laboratory; Stishov, S. M. [Institute for High Pressure Physics of Russian Academy of Sciences

2013-12-06T23:59:59.000Z

436

Phase synchronization analysis by assessment of the phase difference gradient Martin Vejmelka  

E-Print Network [OSTI]

of rhythms of self-sustained oscillatory systems. Typically when trying to identify phase synchronization of coupled self-sustained oscillatory systems, phase synchronization, given by a relation

Savicky, Petr

437

Science Learning+: Phase 1 projects Science Learning+  

E-Print Network [OSTI]

Science Learning+: Phase 1 projects Science Learning+ Phase 1 projects 2 December 2014 #12..............................................................................................................4 Youth access and equity in informal science learning: developing a research and practice agenda..................................................................................................5 Enhancing informal learning through citizen science..............................................6

Rambaut, Andrew

438

FCH Optical Phase-Locked Loop  

E-Print Network [OSTI]

¦ î ¤ ü � ø Ð Ð ú ¸ � í ® FCH Optical Phase- Locked Loop� � û ³ è Optimization of Optica1 Phase

Choi, Woo-Young

439

CRAD, Engineering - Idaho Accelerated Retrieval Project Phase...  

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

Engineering - Idaho Accelerated Retrieval Project Phase II CRAD, Engineering - Idaho Accelerated Retrieval Project Phase II February 2006 A section of Appendix C to DOE G 226.1-2...

440

Phenomenological theories of ferroelectric phase transitions  

E-Print Network [OSTI]

Phenomenological theories of ferroelectric phase transitions W. Cao parameter in the free energy expansion, phenomenological theory can also describe inhomogeneous structures appear-Phenomenological parent and product phases. phenomenological theories in multidimensions for describ-Phenomenological

Cao, Wenwu

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

CRAD, Management - Idaho Accelerated Retrieval Project Phase...  

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

Management - Idaho Accelerated Retrieval Project Phase II CRAD, Management - Idaho Accelerated Retrieval Project Phase II February 2006 A section of Appendix C to DOE G 226.1-2...

442

Studies of phase separable soluble polymers  

E-Print Network [OSTI]

(ethylene glycol) (PEG) oligomers were investigated as phase anchors for SCS palladacycle catalysts. The oligomeric PEG chains were sufficient to engender polar phase solubility in a heptane-DMA thermomorphic system. Microwave irradiation of these thermomorphic...

Furyk, Steven Michael

2006-08-16T23:59:59.000Z

443

Climate Change and Culture Change in Salluit, Quebec, Canada .  

E-Print Network [OSTI]

??The amplified effects of climate change in the Arctic are well known and, according to many commentators, endanger Inuit cultural integrity. However, the specific connections… (more)

Ginsburg, Alexander David

2011-01-01T23:59:59.000Z

444

Enthalpy transients in fractured two-phase geothermal systems  

SciTech Connect (OSTI)

Numerical modeling techniques are used to study the changes in flowing enthalpy of fluids produced from a well completed in a fractured two-phase geothermal reservoir. Complex interactions between different fracture and porous matrix parameters control the enthalpy transients. The results show that the flowing enthalpy is most sensitive to the characteristics of the relative permeability curves, the magnitude of the matrix permeability and the effective fracture porosity. Other parameters such as the thermal conductivity and fracture spacing also significantly affect the flowing enthalpy. In spite of the complex phenomena associated with enthalpy transients in fractured two-phase systems, it is possible to infer useful information about the producing geothermal reservoirs from field data. 15 refs., 13 figs., 2 tabs.

Lippmann, M.J.; Bodvarsson, G.S.; Gaulke, S.W.

1985-03-01T23:59:59.000Z

445

Duality Phase Transition in Type I String Theory  

E-Print Network [OSTI]

We show that the duality phase transition in the unoriented type I theory of open and closed strings is_first order_. The order parameter is the semiclassical approximation to the heavy quark-antiquark potential at finite temperature, extracted from the covariant off-shell string amplitude with Wilson loop boundaries wrapped around the Euclidean time direction. Remarkably, precise calculations can be carried out on either side of the phase boundary at the string scale T_C = 1/2\\pi \\alpha^{'1/2} by utilizing the T-dual, type IB and type I', descriptions of the short string gas of massless gluon radiation. We will calculate the change in the duality transition temperature in the presence of an electromagnetic background field.

Shyamoli Chaudhuri

2005-09-09T23:59:59.000Z

446

Vapor phase modifiers for oxidative coupling  

DOE Patents [OSTI]

Volatilized metal compounds retard vapor phase alkane conversion reactions in oxidative coupling processes that convert lower alkanes to higher hydrocarbons.

Warren, Barbara K. (Charleston, WV)

1991-01-01T23:59:59.000Z

447

Subcritical Fluctuations at the Electroweak Phase Transition  

E-Print Network [OSTI]

We study the importance of thermal fluctuations during the electroweak phase transition. We evaluate in detail the equilibrium number density of large amplitude subcritical fluctuations and discuss the importance of phase mixing to the dynamics of the phase transition. Our results show that, for realistic Higgs masses, the phase transition can be completed by the percolation of the true vacuum, induced by the presence of subcritical fluctuations.

Rudnei O. Ramos

1996-07-24T23:59:59.000Z

448

Solid phase microextraction field kit  

DOE Patents [OSTI]

A field kit for the collection, isolation and concentration of trace amounts of high explosives (HE), biological weapons (BW) and chemical weapons (CW) residues in air, soil, vegetation, swipe, and liquid samples. The field kit includes a number of Solid Phase Microextraction (SPME) fiber and syringe assemblies in a hermetically sealed transportation container or tubes which includes a sampling port, a number of extra SPME fiber and syringe assemblies, the fiber and syringe assemblies including a protective cap for the fiber, and an extractor for the protective cap, along with other items including spare parts, protective glove, and an instruction manual, all located in an airtight container.

Nunes, Peter J.; Andresen, Brian D.

2005-08-16T23:59:59.000Z

449

SPIDERS Phase II Technical Report  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l LPROJECTS IN7 Roadmap forDKT.AwardsSPEER's Building EnergyPhase II

450

THE QCD PHASE DIAGRAM AT FINITE DENSITY.  

SciTech Connect (OSTI)

We study the density of states method to explore the phase diagram of the chiral transition on the temperature and quark chemical potential plane. Four quark flavours are used in the analysis. Though the method is quite expensive small lattices show an indication for a triple-point connecting three different phases on the phase diagram.

SCHMIDT, C.; FODOR, Z.; KATZ, S.

2005-07-25T23:59:59.000Z

451

Special Relativity in Quantum Phase Space  

E-Print Network [OSTI]

A phase space treatment of special relativity of quantum systems is developed. In this approach a quantum particle remains localized if subject to inertial transformations, the localization occurring in a finite phase space area. Unlike non-relativistic transformations, relativistic transformations generally distort the phase space distribution function, being equivalent to aberrations in optics.

Daniela Dragoman

2008-03-06T23:59:59.000Z

452

DOE SBIR Phase-1 Report on Hybrid CPU-GPU Parallel Development of the Eulerian-Lagrangian Barracuda Multiphase Program  

SciTech Connect (OSTI)

This report gives the result from the Phase-1 work on demonstrating greater than 10x speedup of the Barracuda computer program using parallel methods and GPU processors (General-Purpose Graphics Processing Unit or Graphics Processing Unit). Phase-1 demonstrated a 12x speedup on a typical Barracuda function using the GPU processor. The problem test case used about 5 million particles and 250,000 Eulerian grid cells. The relative speedup, compared to a single CPU, increases with increased number of particles giving greater than 12x speedup. Phase-1 work provided a path for reformatting data structure modifications to give good parallel performance while keeping a friendly environment for new physics development and code maintenance. The implementation of data structure changes will be in Phase-2. Phase-1 laid the ground work for the complete parallelization of Barracuda in Phase-2, with the caveat that implemented computer practices for parallel programming done in Phase-1 gives immediate speedup in the current Barracuda serial running code. The Phase-1 tasks were completed successfully laying the frame work for Phase-2. The detailed results of Phase-1 are within this document. In general, the speedup of one function would be expected to be higher than the speedup of the entire code because of I/O functions and communication between the algorithms. However, because one of the most difficult Barracuda algorithms was parallelized in Phase-1 and because advanced parallelization methods and proposed parallelization optimization techniques identified in Phase-1 will be used in Phase-2, an overall Barracuda code speedup (relative to a single CPU) is expected to be greater than 10x. This means that a job which takes 30 days to complete will be done in 3 days. Tasks completed in Phase-1 are: Task 1: Profile the entire Barracuda code and select which subroutines are to be parallelized (See Section Choosing a Function to Accelerate) Task 2: Select a GPU consultant company and jointly parallelize subroutines (CPFD chose the small business EMPhotonics for the Phase-1 the technical partner. See Section Technical Objective and Approach) Task 3: Integrate parallel subroutines into Barracuda (See Section Results from Phase-1 and its subsections) Task 4: Testing, refinement, and optimization of parallel methodology (See Section Results from Phase-1 and Section Result Comparison Program) Task 5: Integrate Phase-1 parallel subroutines into Barracuda and release (See Section Results from Phase-1 and its subsections) Task 6: Roadmap of Phase-2 (See Section Plan for Phase-2) With the completion of Phase 1 we have the base understanding to completely parallelize Barracuda. An overview of the work to move Barracuda to a parallelized code is given in Plan for Phase-2.

Dr. Dale M. Snider

2011-02-28T23:59:59.000Z

453

MID-CYCLE CHANGES IN ETA CARINAE  

SciTech Connect (OSTI)

In late 2006, ground-based photometry of {eta} Car plus the Homunculus showed an unexpected decrease in its integrated apparent brightness, an apparent reversal of its long-term brightening. Subsequent Hubble Space Telescope (HST)/WFPC2 photometry of the central star in the near-UV showed that this was not a simple reversal. This multi-wavelength photometry did not support increased extinction by dust as the explanation for the decrease in brightness. A spectrum obtained with the Gemini Multi-Object Spectrograph on the Gemini-South telescope revealed subtle changes mid-way in {eta} Car's 5.5 yr spectroscopic cycle when compared with HST/Space Telescope Imaging Spectrograph (STIS) spectra at the same phase in the cycle. At mid-cycle the secondary star is 20-30 AU from the primary. We suggest that the spectroscopic changes are consistent with fluctuations in the density and velocity of the primary star's wind, unrelated to the 5.5 yr cycle but possibly related to its latitude-dependent morphology. We also discuss subtle effects that must be taken into account when comparing ground-based and HST/STIS spectra.

Martin, John C. [Physics and Astronomy Department, University of Illinois, Springfield, IL 62703 (United States); Davidson, Kris; Humphreys, Roberta M.; Mehner, Andrea [Astronomy Department, University of Minnesota, Minneapolis, MN 55455 (United States)

2010-05-15T23:59:59.000Z

454

Simplified Numerical Description of Latent Storage Characteristics for Phase Change Wallboard  

E-Print Network [OSTI]

implemented in gypsum board, plaster or other wall-coveringimplemented in gypsum board, plaster or other wall-coveringbillion square meters of plaster board produced annually in

Fuestel, H.E.

2011-01-01T23:59:59.000Z

455

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

Broader source: Energy.gov [DOE]

This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

456

Lauric Acid/Wood Fiber Blends for Shape Stable Phase Change Material  

E-Print Network [OSTI]

of this would have been possible without them. This work was supported by the National Science Foundation's REU Materials and Methods Materials ·Purity >99% Lauric Acid (Palmac 99-12, Acidchem International Sdn. Bhd

Collins, Gary S.

457

Simplified Numerical Description of Latent Storage Characteristics for Phase Change Wallboard  

E-Print Network [OSTI]

buildings and avoid compressor cooling for buildings locatedAlternatives to the Compressor Cooling Project sponsored byAlternatives to Compressor Cooling in Residences," Energy

Fuestel, H.E.

2011-01-01T23:59:59.000Z

458

35.1 Introduction Flows.involving.phase.change.are.ubiquitous.in.geophysical.and.  

E-Print Network [OSTI]

.crust.generate.new.rocks.and.segregate.economically.impor- tant.minerals.into.mineable.seams..Groundwater.is.converted.to. steam.in.geothermal.reservoirs.that.can.be.tapped.for.energy.pro- duction..The.oceans.freeze.and.thaw.in.annual.cycles,.moderat- ing.global.temperatures.and.driving.ocean.circulations..Surface. waters.evaporate,.rise,.and.re-condense.to.form.clouds.and.life- giving.rain

Huppert, Herbert

459

Numerical analysis of binary solid-liquid phase change with buoyancy and surface tension driven convection  

SciTech Connect (OSTI)

The effects of thermo/diffusocapillary convection on the solidification of aqueous NH{sub 4}Cl in a rectangular cavity have been simulated numerically using a newly developed continuum model. Diffusocapillary convection is negligible relative to thermocapillary convection, and for a 20 {times} 20 mm cavity in a one-gravity environment, thermocapillary effects are most pronounced during the early stages of solidification, when flow conditions are characterized by three major cells. One cell, driven by solutal buoyancy forces, extends from the mush region to the melt and separates top and bottom melt region cells driven primarily by surface tension and buoyancy forces, respectively. With increasing time, however, the top cell strengthens and eventually envelops the entire melt. In terms of the strength of the flow, the liquidus front morphology, and the amount of solid formed, final conditions differ only slightly from those predicted for pure thermal/solutal convection.

Incropera, F.P.; Engel, A.H.H. (Purdue Univ., Lafayette, IN (USA). Heat Transfer Lab.); Bennon, W.D. (Alcoa Technical Center, Alcoa Center, PA (US))

1989-01-01T23:59:59.000Z

460

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

Thermal energy storage for sustainable energy consumption –Sustainable Energy, Cambridge University Press, 65- Dermott A.M, Frysinger G.R, Storage

Roshandell, Melina

2013-01-01T23:59:59.000Z

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

Wetting and phase-change phenomena on micro/nanostructures for enhanced heat transfer  

E-Print Network [OSTI]

Micro/nanostructures have been extensively studied to amplify the intrinsic wettability of materials to create superhydrophilic or superhydrophobic surfaces. Such extreme wetting properties can influence the heat transfer ...

Xiao, Rong, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

462

Polyethylene composites containing a phase change material having a C14 straight chain hydrocarbon  

DOE Patents [OSTI]

A composite useful in thermal energy storage, said composite being formed of a polyethylene matrix having a straight chain alkyl hydrocarbon incorporated therein, said polyethylene being crosslinked to such a degree that said polyethylene matrix is form stable and said polyethylene matrix is capable of absorbing at least 10% by weight of said straight chain alkyl hydrocarbon; the composite is useful in forming pellets or sheets having thermal energy storage characteristics.

Salyer, Ival O. (Dayton, OH)

1987-01-01T23:59:59.000Z

463

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

E-Print Network [OSTI]

-00683878,version1-9Jun2014 #12;ing, solar heat or internal loads. Using PCM material in such building walls in the walls storage process. The results show that the PCM wallboards enhance the thermal comfort of occupants buildings. Thermal energy storage can be accomplished either by using sensible heat storage or latent heat

464

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

materials (PCM) in solar thermal concentrating technologyeffective and efficient solar thermal electricity generatorbeen considered for solar thermal energy storages. These are

Roshandell, Melina

2013-01-01T23:59:59.000Z

465

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

E-Print Network [OSTI]

S. a. , 2004, “Solar Thermal Collectors and Applications,”86] Schnatbaum L. , 2009, “Solar Thermal Power Plants,” Thefor Storage of Solar Thermal Energy,” Solar Energy, 18 (3),

Coso, Dusan

2013-01-01T23:59:59.000Z

466

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

E-Print Network [OSTI]

COST REDUCTION STUDY FOR SOLAR THERMAL POWER PLANTS, Ottawa,Storage in Concentrated Solar Thermal Power Plants A ThesisStorage in Concentrated Solar Thermal Power Plants by Corey

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

467

Experimental Assessment of a Phase Change Material for Wall Building Use  

E-Print Network [OSTI]

for reducing energy consumption in passively designed buildings. This tendency is confirmed by numerous papers room. The test cell is totally controlled so that a typical day can be repeated (temperature and solar% the last 30 years. Housing and tertiary buildings are responsible for the consumption of approximatively 46

468

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

E-Print Network [OSTI]

Organometallic Frames for Solar Energy Storage, Berkeley. [and Photovoltaic Solar Energy Converters,” American ChemicalNocera D. G. , 2010, “Solar Energy Supply and Storage for

Coso, Dusan

2013-01-01T23:59:59.000Z

469

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

Proceedings on thermal energy storage and energy conversion;polymer microcomposites for thermal energy storage. SAE SocLow temperature thermal energy storage: a state of the art

Roshandell, Melina

2013-01-01T23:59:59.000Z

470

Simplified Numerical Description of Latent Storage Characteristics for Phase Change Wallboard  

E-Print Network [OSTI]

the discharge of thermal energy storage without "dumping"thermal mass, and • utilize low-energy heating and cooling sources. Large thermal storagelow- energy cooling sources. Large thermal storage devices

Fuestel, H.E.

2011-01-01T23:59:59.000Z

471

Encapsulation of High Temperature Phase Change Materials for Thermal Energy Storage.  

E-Print Network [OSTI]

??Thermal energy storage is a major contributor to bridge the gap between energy demand (consumption) and energy production (supply) by concentrating solar power. The utilization… (more)

Nath, Rupa

2012-01-01T23:59:59.000Z

472

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

3 Fig. 1.2. Solar power plant operation [Materials for Concentrating Solar Power Plant Applications AMaterials for Concentrating Solar Power Plant Applications

Roshandell, Melina

2013-01-01T23:59:59.000Z

473

A Comprehensive Study of Phase Change Materials (PCMs) for Building Walls Applications  

E-Print Network [OSTI]

was conducted using the validated heat transfer model. The performance of the PCM-enhanced wall in several U.S. climate zones was studied. The simulation results for the representative cities showed that a 7 mm (0.28 in) thick PCM layer placed at (3/16)L....1 Background ............................................................................................................. 1 1.2 Literature review..................................................................................................... 3 1...

Fang, Yuan

2009-03-09T23:59:59.000Z

474

Thermal Energy Storage Using Phase Change Materials in Corrugated Copper Panels  

E-Print Network [OSTI]

variations (Lane [2]; Abhat [3]). Latent heat storage has been researched and pioneered by Dr. Telkes in the 1940s (Lane [2]) and others. It did not receive much attention until the energy crisis of the late 1970s and 1980s when it was researched for use... in different applications especially for solar heating. The first application of PCM described in literature was their use for the heating and cooling of buildings by Telkes [4]. The storage capacity of a LHS system incorporating a PCM medium is given...

Aigbotsua, Clifford Okhumeode

2012-07-16T23:59:59.000Z

475

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

E-Print Network [OSTI]

Solar Energy Conversion Applications By Dusan Coso B.S. (UniversitySolar Energy Conversion Applications by Dusan Coso Doctor of Philosophy in Engineering – Mechanical Engineering University

Coso, Dusan

2013-01-01T23:59:59.000Z

476

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

are non-compatibility with plastic containers, and moderateCaCl 2 . 6 H 2 O in plastic film containers reported to beare often containers and bags made of metal or plastic [6].

Roshandell, Melina

2013-01-01T23:59:59.000Z

477

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

that can operate with Stirling engines at 42% efficiency andfor high temperature Stirling engines which operates at 42%turbines such as Stirling engines, while high-temperature (>

Roshandell, Melina

2013-01-01T23:59:59.000Z

478

Using Encapsulated Phase Change Material for Thermal Energy Storage for Baseload CSP  

Broader source: Energy.gov [DOE]

This presentation was delivered at the SunShot Concentrating Solar Power (CSP) Program Review 2013, held April 23–25, 2013 near Phoenix, Arizona.

479

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

E-Print Network [OSTI]

2 Figure 2: Schematic of Sensible Heat Based CSP Plant[3 Figure 3: Schematic of PCM Based CSP Plant[a typical sensible heat based CSP plant. Cold molten salt is

Hardin, Corey Lee

2011-01-01T23:59:59.000Z

480

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

been heated at solar collection tower, at the temperatureIn the receiver tower, the collected solar radiation heatsfocus and send solar radiation to a receiver tower.

Roshandell, Melina

2013-01-01T23:59:59.000Z

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.


481

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

E-Print Network [OSTI]

Storage of Solar Thermal Energy,” Solar Energy, 18 (3), pp.Power Plants,” Journal of Solar Energy Engineering, 124 (2),Cycle Storage of Solar Energy,” Energy & Environmental

Coso, Dusan

2013-01-01T23:59:59.000Z

482

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

microencapsulation. Macroencapsulation means filling the PCMor plastic [6]. Macroencapsulation is very common becauseabilities. Also, macroencapsulation of CaCl 2 . 6 H 2 O in

Roshandell, Melina

2013-01-01T23:59:59.000Z

483

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

E-Print Network [OSTI]

valve in order to maintain a constant pressure. From these experiments we extract the heat transfer coefficient

Coso, Dusan

2013-01-01T23:59:59.000Z

484

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

E-Print Network [OSTI]

Enhancement in Pool Boiling of Nano-fluids,” InternationalLiquid Spreading Due to Nano/Microstructures on the CriticalWicking Action of Micro/Nano Structures on Pool Boiling

Coso, Dusan

2013-01-01T23:59:59.000Z

485

Design of an instrumented microchannel device for characterization of phase change nanofluids  

E-Print Network [OSTI]

As the energy needs of the world continue to grow, it becomes increasingly important to investigate alternative sources of energy. Solar energy is one of our most abundant sources of renewable energy, and researching ways ...

Suabedissen, Karl J. (Karl John)

2010-01-01T23:59:59.000Z

486

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

E-Print Network [OSTI]

Nocera D. G. , 2010, “Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,”Power Plants,” Journal of Solar Energy Engineering, 124 (2),

Coso, Dusan

2013-01-01T23:59:59.000Z

487

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

E-Print Network [OSTI]

allowing a use of solar energy in the construction field. 1. Introduction The storage of thermal energy and the indoor environment [4]. By increasing the thermal inertia due to a latent storage of solar heat entering to a variety of encapsulation methods; one of the most common are micro- encapsulation, incorporation

Paris-Sud XI, Université de

488

Developing New Components to Improve Energy Savings in Buildings by Using Phase Change Materials  

E-Print Network [OSTI]

to build walls, - by developing light envelopes for tertiary buildings. - in the internal dividing wallboards - by developing new panels - in heating, ventilation and air conditioning devices - by developing recuperating/regenerating heat exchangers... good storage density with respect to mass but their thermal conductivity is rather low. They do not react with most chemicals. Their compatibility with metals is very good. They have limited safety constraints, the main problem arising from...

Bontemps, A.; Dendievel, R.; Royon, L.; Sallee, H.

2010-01-01T23:59:59.000Z

489

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

E-Print Network [OSTI]

and Photovoltaic Solar Energy Converters,” American ChemicalNocera D. G. , 2010, “Solar Energy Supply and Storage forof Abiotic Photo-chemical Solar Energy Storage Systems,”

Coso, Dusan

2013-01-01T23:59:59.000Z

490

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

E-Print Network [OSTI]

Nomenclature A b c l c solu c solv C CHF d d c D D b D c E aL b L c L film m m ” m solu m solv M Surface area of a planeH storage ( m solu c solu ? m solv c solv ) in which ?T

Coso, Dusan

2013-01-01T23:59:59.000Z

491

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

analyzed a built-in, storage-type water heater containing astorage and thermal protection that can operate with PCM technology. Among them are building insulators, water heaters,

Roshandell, Melina

2013-01-01T23:59:59.000Z

492

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

537°C) steam for the steam turbine to generate electricity.as heat sources for steam turbines. Mainly three approachesto Stirling or Brayton steam turbine, moderate to high heat

Roshandell, Melina

2013-01-01T23:59:59.000Z

493

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

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10IO1OP001 LetterLight-Duty11.2.1310employeeLongand Gasoline

494

Project Profile: Innovative Application of Maintenance-Free Phase-Change  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion | Department ofT ib l L d FNEPA/309DepartmentDepartment ofCycles |Perovskites

495

Thermal Conductivity Enhancement of High Temperature Phase Change Materials for Concentrating Solar Power Plant Applications  

E-Print Network [OSTI]

for evening cooking in a solar cooker. Energy Convers Manageperformance of a solar cooker based on an evacuated tube

Roshandell, Melina

2013-01-01T23:59:59.000Z

496

One Component Two Phase Flow in Horizontal and Vertical Ducts: Some Basic Considerations  

SciTech Connect (OSTI)

For a description and analysis of the flow they consider the conservation equations of the two phases separately, but in thermal and mechanical equilibrium, coupled by the itnerface shear forces (two fluid model, drift flux model). Coupling may be weak or strong, depending on Froude and Mach numbers of the flow. The fluid is highly compressible, not because the individual phases move at such speeds that their individual density changes are significant but because evapiration (phase change) results in large density changes of the system at moderate pressure or temperature changes once flashing occurs. The slip between the phases is caused by unequal wall shear stress, acceleration of the fluid or gravitational forces and is hindered by the interface interaction. if they denote by {gamma} the ratio of the liquid density to the vapor density and by {sigma} the ratio of the vapor speed to the liquid speed they find that in horizontal flows {sigma} = {gamma}{sup 1/2} yields the maximum slip (neglecting acceleration effects) that can be reached with no interface force acting (assuming equal friction coefficients for both phases at the wall). If one investigates the conditions of thermodynamic flow similarity between different substances in two phase flow, one finds that the latent heat of vaporization is the principal controlling parameter. Thus, a 5 cm diameter test section in two phase R-114, at room temperature, corresponds to a 30 cm diameter duct in water-steam at boiling conditions at high temperatures such as encountered in geothermal and other power production systems.

Maeder, Paul F.; Dickinson, David A.; Nikitopoulos, Dimitris E.

1983-12-15T23:59:59.000Z

497

Renewable Energy and Climate Change  

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

Renewable Energy and Climate Change Symposium in Honor of 2009 and 2010 ACS Fellows in the Industrial and Engineering Chemistry Division Helena Chum, NREL Research Fellow August...

498

Climate Change, Adaptation, and Development  

E-Print Network [OSTI]

climate change is coal gasification, which can make theworld leaders in coal gasification tech- nology, has beenexperimenting with "in situ" gasification, where the coal is

Cole, Daniel H.

2008-01-01T23:59:59.000Z

499

Climate change risk and response  

E-Print Network [OSTI]

Impacts on California’s Water Supply Source Medellin-AzuaraClimate Change on Yields and Water use of Major Californiawith Less: Agricultural Water Conservation and Efficiency in

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z

500

Climate change risk and response  

E-Print Network [OSTI]

Potential Changes in Hydropower Production from Globalon high elevation hydropower generation in California’s7 reduction in the state’s hydropower resources, which last

Kahrl, Fredrich; Roland-Holst, David

2008-01-01T23:59:59.000Z