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Search Publications by: Eric W. Lemmon (Fed)

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Displaying 101 - 125 of 272

Speed of sound measurements and a fundamental equation of state for cyclopentane

April 22, 2015
Author(s)
Eric W. Lemmon, Holger Gedanitz, Maria J. Davila
The speed of sound in liquid cyclopentane has been measured in the temperature range from (258 to 353) K at pressures up to 30 MPa (42 data points) using a pulse-echo method with a double path type sensor. The expanded overall uncertainty (k = 2) in the

A Fundamental Equation of State for 1,1,1,3,3-Pentafluoropropane (R-245fa)

March 26, 2015
Author(s)
Ryo Akasaka, Yong Zhou, Eric Lemmon
A new fundamental equation of state explicit in the Helmholtz energy is presented for 1,1,1,3,3 pentafluoropropane (R 245fa), based on recent experimental data for the vapor pressures, densities, and vapor sound speeds. The functional form now uses

ThermoData Engine (TDE) Version 9.0 (Pure Compounds, Binary Mixtures, Ternary Mixtures, and Chemical Reactions); NIST Standard Reference Database 103b

December 31, 2014
Author(s)
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Kenneth Kroenlein, Chris Muzny, Andrei F. Kazakov, Joe W. Magee, Ilmutdin M. Abdulagatov, Eric Lemmon, Jeongwon Kang
The ThermoData Engine is a software expert systems implementing the concept of dynamic data evaluation. This new release includes implementation of three important new features: (1)new parameters for the NIST "modified UNIFAC" method for predictions of

An Equation of State for the Thermodynamic Properties of Cyclohexane

December 5, 2014
Author(s)
Yong Zhou, Jun Liu, Steven Penoncello, Eric Lemmon
In this work, an equation of state for cyclohexane has been developed using the Helmholtz energy as the fundamental property with independent variables of density and temperature. Multi-property fitting technology was used to fit the equation of state that

Fundamental Equation of State for Deuterium

February 27, 2014
Author(s)
Ian A. Richardson, Jacob W. Leachman, Eric Lemmon
World utilization of deuterium is anticipated to increase with the rise of fusion energy machines such as ITER and NIF. We present a new fundamental equation of state for the thermodynamic properties of fluid deuterium. Differences between thermodynamic

ThermoData Engine (TDE) Version 8.0 (Pure Compounds, Binary Mixtures, Ternary Mixtures, and Chemical Reactions); NIST Standard Reference Database 103b

December 31, 2013
Author(s)
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Kenneth Kroenlein, Chris Muzny, Andrei F. Kazakov, Joe W. Magee, Ilmutdin M. Abdulagatov, Eric Lemmon
The ThermoData Engine is a software expert systems implementing the concept of dynamic data evaluation. This new release includes four important new features. (1) Implementation of the Peng-Robinson EOS for mixtures. (2) Evaluation of ideal-gas entropies

Better Defining the Uncertainties for the AGA-8 Equation

August 22, 2013
Author(s)
Eric W. Lemmon
In order to revise the AGA-8 documentation for publication in 2014, better knowledge of the 0.1% uncertainty level in the equation of state is needed. A 0.1% uncertainty level has been identified by an AGA-8 task group as the acceptable limit of error for

NIST/ASME Steam Properties, Version 3.0

June 3, 2013
Author(s)
Allan H. Harvey, Eric W. Lemmon
This is an update of NIST Standard Reference Database 10. The main purpose of the update is to convert the database to a new graphical user interface that works on 64-bit machines.