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Chemistry

Thermochemical properties

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Displaying 576 - 600 of 781

Calculated Performance of Low-Porosity Regenerators at 4 K with He-4 and He-3

June 9, 2008
Author(s)
Ray Radebaugh, Yonghua Huang, Agnes A. O'Gallagher, John M. Gary
Previously we have shown that the lower volumetric heat capacity and more ideal behavior of helium-3 compared with helium-4 at 4 K results in an improved performance for packed sphere regenerators operating with helium-3 between 4 K and about 20 K. In this

Shear Thinning Near the Critical Point of Xenon

April 17, 2008
Author(s)
Robert F. Berg, Michael R. Moldover, M Yao, G A. Zimmerli
We measured shear thinning, a viscosity decrease ordinarily associated with complex liquids, near the critical point of xenon. The data span the range of reduced shear rates: 0.001 < γτ < 700, where γτ is the shear rate scaled by the relaxation time τ of

Measurements of the isochoric heat capacity, the critical point (Tc, pc) and vapor-liquid coexistence curve (Ts, ps) of high-purity toluene near the critical point

January 15, 2008
Author(s)
Ilmutdin Abdulagatov, Nikolai G. Polikhronidi, Thomas J. Bruno, Rabiyat G. Batyrova, Genadii V. Stepanov
Isochoric heat capacities, phase boundary properties and the critical parameters for high purity (0.9999 mole fraction) toluene have been measured using a high temperature, high pressure, nearly constant volume adiabatic calorimeter and quasi-static

An Automated Densimeter for the Rapid Characterization of Industrial Fluids

October 18, 2007
Author(s)
Stephanie L. Outcalt, Mark O. McLinden
An apparatus for the automated measurement of compressed liquid densities over the temperature range of 270 K to 470 K and pressures to 50 MPa is described. The heart of the apparatus is a commercial vibrating tube densimeter. In order to minimize the

Supplementary Backward Equations p(h,s) for the Critical and Supercritical Regions (Region 3), and Equations for the Two-Phase Region and Region Boundaries of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam*

October 11, 2007
Author(s)
Allan H. Harvey, J S. Gallagher, H J. Kretzschmar, J R. Cooper, K Knobloch, Radim Mares, K Miyagawa, N Okita, Roland Span, I. Stocker, Wolfgang Wagner, I Weber
In modeling advanced steam power cycles, thermodynamic properties as functions of enthalpy and entropy are required in the critical and supercritical regions (region 3 of IAPWS-IF97). With IAPWS-IF97, these calculations require cumbersome two-dimensional

The third industrial fluid properties simulation challenge

September 7, 2007
Author(s)
F Case, John K. Brennan, Anne M. Chaka, Kerwin Dobbs, Daniel G. Friend, David Frurip, Peter A. Gordon, J Moore, Raymond D. Mountain, J Olson, Richard B. Ross, Martin Schiller, Vincent K. Shen
The third Industrial fluid properties simulation challenge was held from March to September 2006. As in the previous two events, contestants were challenged to predict specific, industrially relevant, properties of fluid systems. Their efforts were judged
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