BS ISO 20765-1 : 2005
Current
The latest, up-to-date edition.
NATURAL GAS - CALCULATION OF THERMODYNAMIC PROPERTIES - PART 1: GAS PHASE PROPERTIES FOR TRANSMISSION AND DISTRIBUTION APPLICATIONS
Hardcopy , PDF
English
01-01-2005
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Thermodynamic basis of the method
4.1 Principle
4.2 The fundamental equation of Helmholtz free energy
4.3 Thermodynamic properties derived from the Helmholtz
free energy
5 Method of calculation
5.1 Input variables
5.2 Conversion from pressure to reduced density
5.3 Implementation
6 Ranges of application
6.1 Pressure and temperature
6.2 Pipeline quality gas
7 Uncertainty
7.1 Uncertainty for pipeline quality gas
7.2 Impact of uncertainties of input variables
8 Reporting of results
Annex A (normative) - Symbols and units
Annex B (normative) - The Helmholtz free energy of the
ideal gas
Annex C (normative) - The equation for the Helmholtz free
energy
Annex D (normative) - Detailed documentation for the
equation of state
Annex E (informative) - Assignment of trace components
Annex F (informative) - Implementation of the method
Annex G (informative) - Examples
Bibliography
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