Functional Forms to Describe Thermodynamic Properties of Gases for Fast Calculations

A simple way to derive physically based functional forms for approximate description of thermodynamic properties of gases is presented. The polynomials in transformed variables obtained are intended for fast industrial calculations. The approach is applied on eleven thermodynamic dependencies with p...

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Bibliographic Details
Published in:Journal of engineering for gas turbines and power 1996-01, Vol.118 (1), p.210-213
Main Author: PATEK, J
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Theoretical studies. Data and constants. Metering
Thermodynamics, mechanics etc. For energy applications
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Summary:A simple way to derive physically based functional forms for approximate description of thermodynamic properties of gases is presented. The polynomials in transformed variables obtained are intended for fast industrial calculations. The approach is applied on eleven thermodynamic dependencies with pairs of independent variables most frequently encountered in turbine calculations. These functional forms were originally derived for the description of steam properties, but they are equally applicable to any gas in adequate region of state parameters. Approximation function for the dependence T(h, s) of steam is presented as an example including the values of 18 fitted parameters.
ISSN:0742-4795
1528-8919
DOI:10.1115/1.2816542