BSI PD ISO/TR 29922:2017
$215.11
Natural gas. Supporting information on the calculation of physical properties according to ISO 6976
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 116 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 8 | Foreword |
| 9 | Introduction |
| 11 | 1 Scope 2 Normative references 3 Terms and definitions 4 Symbols, units and abbreviated terms 4.1 Quantities |
| 13 | 4.2 Subscripts 4.3 Superscripts 4.4 Abbreviated terms |
| 14 | 5 Enthalpy of combustion of the ideal gas and its variation with temperature 5.1 Preamble 5.2 Standard enthalpy of combustion at 25 °C |
| 15 | 5.3 Standard enthalpy of combustion at other temperatures |
| 16 | 5.4 Formulation of the ideal-gas enthalpy |
| 17 | 5.5 Illustrative examples |
| 18 | 5.6 Uncertainty in enthalpy of combustion |
| 19 | 6 Non-ideality: Variation of real-gas enthalpy of combustion with pressure 6.1 Preamble |
| 20 | 6.2 Formulation of the enthalpic correction |
| 22 | 6.3 Estimation of the enthalpic correction |
| 23 | 6.4 Conclusion 7 Non-ideality: Compression factor effect on volume-basis calorific values 7.1 Compression factor |
| 24 | 7.2 Virial equation of state |
| 25 | 7.3 Estimation of mixture compression factor |
| 27 | 7.4 Limitations of the modified IGT-32 method |
| 28 | 7.5 Uncertainty in compression factor 8 Quantitation of volumetric non-ideality 8.1 Second virial coefficients of pure components 8.1.1 Preliminary procedures |
| 29 | 8.1.2 Improved procedure |
| 31 | 8.2 Summation factors of pure components 8.2.1 Overview 8.2.2 Major components of natural gas |
| 32 | 8.2.3 Hydrogen and helium |
| 33 | 8.3 Compression factors of the permanent gases |
| 35 | 8.4 Pure component uncertainties 8.4.1 Uncertainty of second virial coefficients 8.4.2 Truncation error |
| 37 | 8.4.3 Linearization error |
| 38 | 8.4.4 Berlin versus Leiden |
| 39 | 8.4.5 Hydrogen and helium |
| 40 | 8.4.6 Water |
| 41 | 8.4.7 Combination of uncertainties 8.5 Mixture uncertainty 9 Miscellaneous data 9.1 Atomic weights of the elements 9.1.1 Atomic weights 2007 |
| 42 | 9.1.2 Atomic weights 2009 and 2011 |
| 44 | 9.1.3 Discussion |
| 45 | 9.2 Composition and molecular weight of dry air |
| 46 | 10 Effects of water vapour on calorific value 10.1 Preamble |
| 47 | 10.2 Excluded volume effect |
| 48 | 10.3 Latent heat (enthalpic) effect |
| 49 | 10.4 Compression factor effect 10.5 Combination of effects |
| 50 | 10.6 Spectator water |
| 51 | 10.7 Effect of humid air 10.7.1 Preamble |
| 52 | 10.7.2 Stoichiometric combustion with oxygen 10.7.3 Combustion of dry gas with excess dry air |
| 53 | 10.7.4 Combustion of wet gas with excess dry air 10.7.5 Combustion of wet gas with excess humid air |
| 55 | 11 Summary, discussion and selection of the calorific value of methane 11.1 Standard enthalpy of combustion 11.1.1 Background 11.1.2 Selection of data |
| 56 | 11.1.3 Recalculation of Rossini values |
| 58 | 11.1.4 Evaluation of selected data |
| 62 | 11.1.5 Selected value and uncertainty 11.2 Derived calorific values |
| 64 | 11.3 Comparisons between calorimetric methodologies |
| 66 | 12 Calorific values on a mass basis 12.1 Calorific values on a mass basis for components of natural gas |
| 67 | 12.2 Alternative (non-normative) method of calculation for mass-basis calorific values |
| 70 | 13 Calorific values on a volume basis 13.1 Calorific values on a volume basis for components of natural gas 13.2 Alternative (non-normative) method of calculation for volume-basis calorific values |
| 73 | 14 Approximate conversion between reference conditions 14.1 Factors for conversion between metric reference conditions |
| 75 | 14.2 Equations for conversion between metric reference conditions 14.3 Expression of non-SI reference (base) pressures in metric units |
| 76 | 15 Mathematical and methodological issues relating to estimation of uncertainty 15.1 Principles |
| 78 | 15.2 Input data 15.2.1 Preamble 15.2.2 Reference conditions 15.2.3 Composition data |
| 79 | 15.2.4 Physical property data |
| 80 | 15.3 Uncertainty of the calculational method 15.4 Evaluation of sensitivity coefficients 15.4.1 Preamble |
| 81 | 15.4.2 Analytical method |
| 83 | 15.4.3 Finite difference method 15.4.4 Monte Carlo method 16 Detailed derivation of uncertainty equations in ISO 6976:2016 16.1 Principles and assumptions |
| 84 | 16.2 General formulation |
| 85 | 16.3 Effects of correlations 16.3.1 Correlation between mole fractions |
| 86 | 16.3.2 Correlation between molar masses |
| 88 | 16.3.3 Correlation between physical properties 16.4 Uncertainty equations for basic properties 16.4.1 Molar mass |
| 89 | 16.4.2 Molar-basis gross calorific value 16.4.3 Molar-basis net calorific value |
| 90 | 16.4.4 Summation factor 16.4.5 Compression factor |
| 91 | 16.5 Uncertainty equations for compound properties 16.5.1 Mass-basis gross calorific value |
| 92 | 16.5.2 Mass-basis net calorific value |
| 93 | 16.5.3 Volume-basis gross calorific value |
| 94 | 16.5.4 Volume-basis net calorific value |
| 96 | 16.5.5 Density |
| 97 | 16.5.6 Relative density |
| 98 | 16.5.7 Gross Wobbe index |
| 99 | 16.5.8 Net Wobbe index |
| 101 | 16.6 Repeatability and reproducibility |
| 102 | 17 Computer implementation of recommended methods 17.1 Compiled BASIC shareware program |
| 104 | 17.2 Spreadsheet implementation |
| 107 | Bibliography |
