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Energy

Alternative energy

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Displaying 526 - 550 of 706

Correlation for the Viscosity of Hydrogen obtained from Symbolic Regression

March 27, 2013
Author(s)
Chris D. Muzny, Marcia L. Huber, Andrei F. Kazakov
We report the results of a symbolic regression methodology to obtain both the functional form and the coefficients for a wide-ranging correlation for the viscosity of normal hydrogen. The correlation covers the temperature range from the triple point

A Humidity Generator for Temperatures to 200 degC and Pressures to 1.6 MPa

November 30, 2012
Author(s)
D Vega-Maza, W. Wyatt Miller, Dean C. Ripple, Gregory E. Scace
We have constructed a new humidity generator that produces gas streams of known moisture content at temperatures from 85 °C to 200 °C, absolute pressures from 0.2 MPa to 1.6 MPa, and relative humidities from 10 % to 90 %. The generator produces a moist gas

Energy Price Indices and Discount Factors for Life-Cycle Cost Analysis - 2012

November 26, 2012
Author(s)
Amy S. Rushing, Joshua D. Kneifel, Barbara C. Lippiatt
This is the 2012 edition of energy price indices and discount factors for performing life-cycle cost analyses of energy and water conservation and renewable energy projects in federal facilities. It will be effective from April 1, 2012 to March 31, 2013

Second Virial Coefficients of H2 and its Isotopologues from a Six-Dimensional Potential

October 17, 2012
Author(s)
Giovanni Garberoglio, Piotr Jankowski, Krzysztof Szalewicz, Allan H. Harvey
We employ path-integral Monte Carlo techniques to compute the second virial coefficient as a function of temperature for molecular hydrogen (H2), deuterium (D2), and tritium (T2), along with the mixed isotopologues HD, HT, and DT. The calculations utilize

High-Resolution Local Current Measurement of CdTe Solar Cells

October 4, 2012
Author(s)
Heayoung Yoon, Dmitry A. Ruzmetov, Paul M. Haney, Marina S. Leite, Behrang H. Hamadani, Albert A. Talin, Nikolai B. Zhitenev
We investigate local electronic properties of CdTe solar cells using electron beam to excite electron-hole pairs and evaluate spatially resolved photocurrent characteristics. Standard semiconductor processes were used to fabricate Ohmic metal contacts on

Mg-Fe Thin Films: A Phase-separated Structure with Fast Kinetics of Hydrogenation

September 20, 2012
Author(s)
Shiyou Zheng, Ke Wang, Vladimir Oleshko, Leonid A. Bendersky
In this paper we suggest a new approach to improve the kinetics of hydrogenation based on a material with high density of interfaces between hydride-forming solid (HFS) and hydrogen-diffusing solid media (HDM). Such materials can be realized for phase
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