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Energy

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Displaying 276 - 300 of 571

Advances in Materials Science for Environmental and Energy Technologies IV (Preface)

September 4, 2015
Author(s)
Winnie K. Wong-Ng, Josef Matyas, Tatsuki Ohji, Kanakala Raghunath, Gary Pickrell
The Materials Science and Technology 2014 Conference and Exhibition (MS&T’14) was held October 12-16, 2014 at the David L. Lawrence Convention Center, Pittsburgh, Pennsylvania. One of the major themes of the conference was Environmental and Energy Issues

Hitting the bounds of chemistry: Limits and tradeoffs for low-GWP refrigerants.

August 19, 2015
Author(s)
Mark O. McLinden, J. Steven Brown, Andrei F. Kazakov, Piotr A. Domanski
We explore the possibilities for low-GWP refrigerants through two approaches. First, we explore the performance of hypothetical refrigerants to define the limits of what is allowed by thermodynamics. In the second approach, we apply property estimation

Direct Observation of Carrier Cooling in Organic Semiconductors

July 16, 2015
Author(s)
Edwin J. Heilweil, Paul A. Lane, Paul D. Cunningham, Joseph S. Melinger
Photocurrent in an organic solar cell is generated by a charge transfer reaction between the electron donor and acceptor. The effect of excess excitation energy and the relative contributions of electron and hole transfer are the subject of intense

Electron beam induced current in the high injection regime

July 2, 2015
Author(s)
Paul M. Haney, Heayoung Yoon, Prakash Koirala, Robert W. Collins, Nikolai B. Zhitenev
Electron beam induced current (EBIC) is a powerful technique which measures the charge collection efficiency of photovoltaics with sub-micron spatial resolution. The exciting electron beam results in a high generation rate density of electron-hole pairs

X-ray Powder Diffraction Studies of (BaxSr1-x)2Co2Fe12O22 and (BaxSr1-x)Co2Fe16O27

June 30, 2015
Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Yonggao Yan, Kevin R. Talley, James A. Kaduk
X-ray structural characterization and X-ray reference powder patterns have been determined for two series of iron- and cobalt-containing layered compounds, namely, (BaxSr1-x)2Co2Fe12O22 (x = 0.2, 0.4, 0.6, 0.8) and (BaxSr1-x)Co2Fe16O27 (x = 0.2, 0.4, 0.6

Phase Equilibria and Crystal Chemistry of the CaO-?Sm2O3-CoOz System at 885 degC in Air

June 27, 2015
Author(s)
Winnie K. Wong-Ng, William J. Laws, Saul H. Lapidus, James A. Kaduk
The CaO-¿Sm2O3-CoOz system prepared at 885 °C in air consists of two calcium cobaltate compounds, namely, the 2D thermoelectric oxide solid solution, (Ca3-xSmx)Co4O9-z (0 x 0.5) which has a misfit layered structure, and the 1D Ca3Co2O6 which consists of

Flexible metal-organic framework compounds: In situ studies for selective CO2 capture

June 19, 2015
Author(s)
Andrew J. Allen, Laura Espinal, Winnie K. Wong-Ng, Wendy Queen, Craig Brown, Steven R. Kline, Kristi L. Kauffman, Jeffrey T. Culp
Results from in situ experiments are presented to correlate carbon capture with dynamic structural changes in two flexible metal-organic framework (MOF) materials: porous coordination polymers (PCPs) exhibiting promising carbon dioxide adsorption

A Generalized Data-Driven Energy Prediction Model with Uncertainty for a Milling Machine Tool using Gaussian Process

June 8, 2015
Author(s)
Jinkyoo Park, Raunak Bhinge, Nishant Biswas, Amrita Srinivasan, Kincho H. Law, David Dornfeld, Moneer Helu, Sudarsan Rachuri
Using a machine learning approach, this study investigates the effects of machining parameters on the energy consumption of a milling machine tool, which would allow selection of optimal operational strategies to machine a part with the minimum energy

Guide to Industrial Control Systems (ICS) Security

June 3, 2015
Author(s)
Keith A. Stouffer, Victoria Y. Pillitteri, Suzanne Lightman, Marshall Abrams, Adam Hahn
This document provides guidance on how to secure Industrial Control Systems (ICS), including Supervisory Control and Data Acquisition (SCADA) systems, Distributed Control Systems (DCS), and other control system configurations such as Programmable Logic

Performance Ranking of Refrigerants With Low Global Warming Potential

January 7, 2015
Author(s)
Mark A. Kedzierski, J S. Brown, Junemo Koo
This paper evaluates in a typical air-conditioner the cycle performance of thirty-nine refrigerants identified in the AHRI Low Global Warming Potential (GWP) Alternative Refrigerants Evaluation Program (Low-GWP AREP). The Low-GWP AREP was initiated in

Biomass Particle Models with Realistic Morphology and Resolved Microstructure for Simulations of Intraparticle Transport Phenomena

December 9, 2014
Author(s)
Peter Ciesielski, Michael F. Crowley, M R. Nimlos, Aric Sanders, Gavin Wiggins, Bryon Donohoe
Biomass exhibits a complex microstructure of directional pores that can vary substantially between species of origin. However, models of biomass particles employed in simulations of conversion processes typically employ over-simplified geometry such as
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