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Displaying 401 - 425 of 583

Commissioning Cost-Benefit and Persistence of Savings: A Report on Cost-Effective Commissioning of Existing and Low Energy Buildings

September 17, 2012
Author(s)
Hannah Friedman, Marti Frank, David Claridge, Kristin Heinemeier, Kim Crossman, Eliot Crowe, Cory Toole, Natascha S. Milesi-Ferretti, Daniel Choniere
Commissioning of new and existing buildings has been shown to reduce energy usage and can also produce non-energy related benefits such as improved occupant comfort. When compared with other initiatives such as installation of high efficiency equipment or

Density and Speed of Sound Measurements of Four Bio-derived Fuels

September 13, 2012
Author(s)
Stephanie L. Outcalt, Tara J. Fortin
Compressed-liquid densities and ambient pressure densities and speeds of sound of four biomass-derived fuels have been measured. The compressed-liquid measurements were made from 270 K to 470 K, and 0.5 MPa to 50 MPa. The ambient pressure measurements were

FATIGUE CRACK GROWTH OF TWO X52 PIPELINE STEELS IN A PRESSURIZED HYDROGEN ENVIRONMENT

September 9, 2012
Author(s)
Andrew J. Slifka, Elizabeth S. Drexler, Neha N. Rustagi, Damian S. Lauria, Joseph D. McColskey, Robert L. Amaro
Fatigue crack growth tests were conducted on two API 5L X52 pipeline steel alloys. One alloy was from a new linepipe that was installed for hydrogen service in 2011. The other alloy was from a vintage pipe that first saw natural gas service in 1964

Signal Processing Techniques for Smart Grid: Scanning the Issue

September 2, 2012
Author(s)
Hamid Gharavi
This is an editorial article for a special issue on Smart Grid. The main emphasis of this issue is the technical challenges of the Smart Grid from a signal processing perspective. Therefore, the selected articles aim at articulating signal processing

Saturation molalities and standard molar enthalpies of solution of alpha-D-xylose(cr) in H2O(l); Standard molar enthalpies of solution of 1,4-beta-D-xylobiose(am), and 1,4-beta-D-xylotriose(am) in H2O(l)

May 14, 2012
Author(s)
Robert N. Goldberg, Brian Lang, Bruce Coxon, Stephen R. Decker
The saturation molality of alpha-D-xylose(cr) in water was measured by using HPLC and is m(sat) = (8.43 ± 0.42) mol∙kg-1 at the temperature T = 298.15 K. It was also established that the anhydrous form of alpha-D-xylose(cr) is the crystalline form that is

Inelastic Neutron Scattering on Polymer Electrolytes for Lithium-Ion Batteries

May 7, 2012
Author(s)
Huagen H. Peng, Madhu Sudan Tyagi, Kirt A. Page, Christopher Soles
The relationship between ion transport and polymer dynamics is central to the pursuit of solid polymer electrolytes for lithium batteries. This understanding is critical to achieve solid polymer electrolyte systems of sufficiently high ion conductivities

Computational Seebeck Coefficient Measurement Simulations

May 2, 2012
Author(s)
Joshua B. Martin
We have employed finite element analysis to develop computational Seebeck coefficient metrology simulations. This approach enables a unique exploration of multiple probe arrangements and measurement techniques within the same temporal domain. To

Materials Challenges in Carbon Mitigation Technologies

April 24, 2012
Author(s)
Laura Espinal, Bryan D. Morreale
Thermochemical conversion of fossil fuels currently dominates the national and global energy portfolio, with the most notable being the stationary power production and transportation vehicles sectors. As global energy demand continues to increase

Carbon Storage Properties of OMS-2 Manganese Oxide

April 10, 2012
Author(s)
Lan (. Li, Eric J. Cockayne, Laura Espinal, Winnie K. Wong-Ng
Manganese oxide OMS-2 material, also known as alpha-MnO2, exhibits CO2 sorption hysteresis at pressures > 7 bar. Our experiments show that the hysteretic behavior strongly depends on time, temperature and pressure. To understand the atomic structures and

A Prototype Web-Based User Interface for Sustainability Modeling and Optimization

March 28, 2012
Author(s)
Guodong Shao, David Westbrook, Alexander Brodsky
A growing number of manufacturing industries are initiating efforts to address sustainability issues. Energy efficient manufacturing and low carbon manufacturing are gaining particular attention. Finding the optimal solution of operational strategy and

Thermoelectric Properties and Structural Variations in Bi2Te3-xSx Crystals

February 23, 2012
Author(s)
Winnie K. Wong-Ng, Howard Joress, Joshua B. Martin, Peter Zavalij, Yonggao Y. Yan, Jihui Yang
We have successfully correlated the thermoelectric properties, structure and compositional variations of a Bi2Te3-xSx single crystal using a custom-designed, non-destructive, high-throughput Seebeck coefficient screening tool, together with a single

Direct Observation of Hydrogen Spillover in Ni-Loaded Pr-Doped Ceria

January 17, 2012
Author(s)
Vaneet Sharma, Peter A. Crozier, Renu Sharma, James B. Adams
Hydrogen-spillover in Ni-loaded Pr-doped ceria (PDC) was directly observed using an environmental transmission electron microscope (ETEM). Localized reduction of ceria in a H2 atmosphere was observed and attributed to gas-Ni-ceria interactions at the three

Electrolyte stability determines scaling limits for solid-state 3D Li-ion batteries

December 20, 2011
Author(s)
Dmitry A. Ruzmetov, Vladimir P. Oleshko, Paul M. Haney, Henri J. Lezec, K Karki, K Baloch, Amit K. Agrawal, Albert Davydov, Sergiy Krylyuk, Y Liu, JY Huang, Mihaela M. Tanase, John Cumings, Albert A. Talin
Rechargeable, all-solid state Li-ion batteries (LIBs) with high specific capacity and small footprint are highly desirable to power an emerging class of miniature, autonomous microsystems that operate without a hardwire for power or communications. A

Electronic structures of lithium battery interphase compounds: comparison between inelastic x-ray scattering measurements and theory

December 13, 2011
Author(s)
Eric L. Shirley, Timothy Fister, Moritz Schmidt, Paul Fenter, Christopher Johnson, Michael Slater, Maria K. Chan
In lithium ion batteries, decomposition of the electrolyte near an electrode surface can play a crucial role in determining the device’s long-term performance. The reactivity and the low core binding energy of lithium, carbon, oxygen, and fluorine have

Structural and Thermoelectric properties of BaRCo4O7 (R=Dy, Ho, Er, Tm,Yb, and Lu)

December 6, 2011
Author(s)
Winnie K. Wong-Ng, Wenjie Xie, Yonggao Y. Yan, Guangyao Liu, James A. Kaduk, Evans L. Thomas, Terry M. Tritt
The structure and thermoelectric properties of a series of barium lanthanide cobaltites, BaRCo4O7 (R = Dy, Ho, Er, Tm,Yb, and Lu), which were prepared using the spark plasma synthesis (SPS) technique, have been investigated. The space group of these

Towards realization of a large-area, LED-based solar simulator

November 27, 2011
Author(s)
Behrang H. Hamadani, Kangbin Chua, John F. Roller, Howard W. Yoon, Brian P. Dougherty
LED-based solar simulators have shown great promise as alternative light sources for indoor testing of PV cells as compared to their traditional counterparts. However, large-area uniform illumination more suitable for larger cells and module measurements
Displaying 401 - 425 of 583
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