BS EN ISO 15112:2018 – TC:2020 Edition
$280.87
Tracked Changes. Natural gas. Energy determination
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 170 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 92 | undefined |
| 94 | European foreword Endorsement notice |
| 97 | Foreword |
| 98 | Introduction |
| 99 | 1 Scope 2 Normative references 3 Terms and definitions |
| 104 | 4 Symbols and units |
| 105 | 5 General Principles |
| 106 | 6 Gas measurement 6.1 General |
| 107 | 6.2 Volume measurement 6.3 Calorific value measurement 6.3.1 Measurement techniques and sampling |
| 108 | 6.3.2 Direct measurement — Calorimetry 6.3.3 Inferential measurement 6.3.4 Correlation techniques 6.3.5 Pressure and temperature 6.3.6 Gas quality tracking 6.4 Volume conversion 6.4.1 General |
| 109 | 6.4.2 Density 6.4.3 Compression factor 6.5 Calibration 6.6 Data storage and transmission |
| 110 | 7 Energy determination 7.1 Interfaces |
| 112 | 7.2 Methods of energy determination 7.2.1 Direct determination of energy 7.2.2 Indirect determination of energy |
| 114 | 8 Strategy and procedures 8.1 General |
| 115 | 8.2 Strategies for energy determination |
| 116 | 8.2.1 Strategies for single interfaces |
| 120 | 8.3 Plausibility checks |
| 121 | 9 Assignment methods 9.1 Fixed assignment 9.1.1 Fixed assignment of a measured calorific value |
| 122 | 9.1.2 Fixed assignment of a declared calorific value |
| 123 | 9.2 Variable assignment 9.2.1 Input at two or more different stations with zero floating point |
| 124 | 9.2.2 Input at two or more different stations with comingled gas flows |
| 125 | 9.3 Determination of the representative calorific value 9.3.1 Arithmetically averaged calorific value 9.3.2 Quantity-weighted average calorific value 9.3.3 Gas quality tracking |
| 128 | 10 Calculation of energy quantities 10.1 General formulae for energy |
| 129 | 10.2 Calculation of averaged values — Calculation from average calorific values and cumulative volumes 10.2.1 Arithmetic average of the calorific value |
| 130 | 10.2.2 Quantity-weighted average of the calorific value 10.3 Volume and volume-to-mass conversions 10.4 Energy determination on the basis of declared calorific values 11 Accuracy on calculated energy 11.1 Accuracy |
| 131 | 11.2 Calculation of uncertainty |
| 132 | 11.3 Bias |
| 133 | 12 Quality control and quality assurance 12.1 General 12.2 Check of the course of the measuring data |
| 134 | 12.3 Traceability 12.4 Substitute values |
| 136 | Annex A (informative) Main instruments and energy-determination techniques |
| 140 | Annex B (informative) Different possible patterns in the change of the calorific value |
| 143 | Annex C (informative) Volume conversion and volume-to-mass conversion |
| 144 | Annex D (informative) Incremental energy determination |
| 146 | Annex E (informative) Practical examples for volume conversion and energy quantity calculation |
| 150 | Annex F (informative) Practical examples for averaging the calorific value due to different delivery situations |
| 155 | Annex G (informative) Ways of determining substitute values |
| 157 | Annex H (informative) Plausibility check graphical example |
| 158 | Annex I (informative) Uncorrected data, bias correction and final result graphical example |
| 160 | Annex J (informative) Single-reservoir calorific value determination |
| 162 | Annex K (informative) |
| 168 | Bibliography |
