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Search Publications by: Allan H. Harvey (Fed)

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Displaying 176 - 200 of 260

Supplementary Backward Equations for the Industrial Formulation IAPWS-IF97 of Water and Steam for Fast Calculations of Heat Cycles, Boilers, and Steam Turbines

November 12, 2007
Author(s)
H J. Kretzschmar, K Knobloch, K Miyagawa, Allan H. Harvey, Wolfgang Wagner
This Extended Abstract summarizes the various supplementary equations that have been developed by the International Association for the Properties of Water and Steam to improve the calculation speed of the industrial standard formulation IAPWS-IF97 for

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

Avoid Common Pitfalls when using Henry's Law

September 3, 2007
Author(s)
Allan H. Harvey, Francis L. Smith
This article provides practical guidance for the use of Henry's law in design calculations, with emphasis on solutes in aqueous systems at conditions characteristic of wastewater cleanup operations. Particular attention is given to the temperature

First-Principles Calculation of the Air-Water Second Virial Coefficient

April 2, 2007
Author(s)
Allan H. Harvey, Peter H. Huang
Recent theoretical work has produced quantitatively accurate potential-energy surfaces for water with common gases. These pair potentials have been used to calculate cross second virial coefficients with an accuracy superior to that obtained by most

Intermolecular potential and second virial coefficient of the water-nitrogen complex

March 6, 2007
Author(s)
Allan H. Harvey, Akyl S. Tulegenov, Richard J. Wheatley, Matthew P. Hodges
We construct a rigid-body (five-dimensional) potential-energy surface for the water-nitrogen complex using the systematic intermolecular potential extrapolation routine (SIMPER). The intermolecular potential is then extrapolated to the limit of a complete

Effect of Dissolved Air on the Density and Refractive Index of Water

September 30, 2005
Author(s)
Allan H. Harvey, Simon G. Kaplan, John H. Burnett
We consider the effect of dissolved air on the density and the refractive index of liquid water from 0 ¿aC to 50 ¿aC. The density effect is calculated from the best available values of Henry's constants and partial molar volumes for the components of air

Molecular simulation of the diffusivity of NaOH in steam

June 1, 2005
Author(s)
Allan H. Harvey, Raymond D. Mountain
Molecular dynamics simulation is used to calculate the infinite-dilution diffusivity of sodium hydroxide (NaOH) in steam at conditions of temperature and density typical of steam turbines. These data are needed in order to better understand deposition

Method for Estimating the Dielectirc Constant of Natural Gas Mixtures

January 11, 2005
Author(s)
Allan H. Harvey, Eric W. Lemmon
A method is developed for calculating the static dielectric constant (relative permittivity) of fluid mixtures, with an emphasis on natural gas. The dielectric constant is calculated as a function of temperature, density, and composition; the density is

Method for estimating the dielectric constant of natural gas mixtures

January 11, 2005
Author(s)
Allan H. Harvey, Eric Lemmon
A method is developed for calculating the static dielectric constant (relative permittivity) of fluid mixtures, with an emphasis on natural gas. The dielectric constant is calculated as a function of temperature, density, and composition; the density is