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Energy

Alternative energy

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Displaying 551 - 575 of 706

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

High-resolution neutron radiography of through-plane liquid water distribution in polymer electrolyte membrane and gas diffusion layer

August 14, 2012
Author(s)
Daniel S. Hussey, David L. Jacobson, Richard Fu, Ugur Pasaogullari, Takeshi Shiomi, Yuichiro Tabuchi
We re-investigate our previously studied water transport phenomena under nonisothermal conditions by measuring the through-plane liquid water distribution across PEFC components with the state-of-the-art high-resolution neutron radiography. A corrective

SORCE SSI Workshop Summary

July 1, 2012
Author(s)
Joseph P. Rice, Jerald Harder, Martin Snow, Thomas Woods
Over 30 scientists and calibration specialists gathered at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, for the first Solar Spectral Irradiance (SSI) Variations Workshop, Feb. 28-March 1, 2012. The purpose of the

Compressed-liquid densities of two highly polar + non-polar binary systems

June 24, 2012
Author(s)
Stephanie L. Outcalt, Arno R. Laesecke
The binary systems ethanol + 2,2,4-trimethylpentane and 2-butanol + 2,2,4-trimethylpentane were studied as models for blends of gasoline with biofuels. Their densities were measured with a vibrating-tube densimeter at compressed-liquid states of three

A novel solar simulator based on a super-continuum laser

June 3, 2012
Author(s)
Tasshi Dennis, John B. Schlager, Hao-Chih Yuan, Qi Wang, Daniel Friedman
The design and operation of a novel solar simulator based on a high-power, super-continuum fiber laser is described in this work. The simulator features a multi-sun irradiance with continuous spectral coverage from the visible to the infrared. By use of a

Modeling the Vapor Pressure of Biodiesel Fuels

February 22, 2012
Author(s)
O. Castellanos Diaz, F. Schoeggl, H.W. Yarranton, Marco Satyro, Tara Lovestead, Thomas J. Bruno
The composition, vapour pressure, and heat capacity of nine biodiesel fuels from different sources were measured. The vapour pressure of the biodiesel fuels is modeled assuming an ideal liquid phase of the fatty acid methyl esters constituting the fuel
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