BS EN ISO 12213-3:2005:2006 Edition
$167.15
Natural gas. Calculation of compression factor – Calculation using physical properties
| Published By | Publication Date | Number of Pages |
| BSI | 2006 | 40 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 1 | BRITISH STANDARD BS EN ISO 12213-3:2005 Natural gas – Calculation of compression factor – Part 3: Calculation using physical properties |
| 2 | This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 April 1998 National foreword |
| 3 | Contents |
| 8 | Contents |
| 9 | Foreword |
| 11 | 1 Scope NOTE In principle, it is possible to calculate the compression factor when any three of the parameters superior calorific value,… 2 Normative references 3 Definitions 4 Method of calculation 4.1 Principle |
| 12 | 4.2 The SGERG-88 equation 4.3 Input variables 4.3.1 Preferred input data set |
| 13 | 4.3.2 Alternative input data sets 4.4 Ranges of application 4.4.1 Pipeline quality gas |
| 14 | 4.4.2 Wider ranges of application 4.5 Uncertainty 4.5.1 Uncertainty for pipeline quality gas |
| 15 | Figure 1 – Uncertainty limits for the calculation of compression factors (The uncertainty limits given are expected to be valid for natural gases and similar gases withand for 30 MJ·m-3 < HS < 45 MJ·m-3 and 0,55 < d < 0,80) 4.5.2 Uncertainty for wider ranges of application 4.5.3 Impact of uncertainties of input variables 4.5.4 Reporting of results |
| 16 | Table 1 – Uncertainties of input variables 5 Suppliers of computer programmes |
| 19 | a) A Basic version, described in GERG TM5 [3], which may be used with a variety of metric reference conditions. This programme was designed mainly for PC applications. b) A version in C, described in German DVGW Directives, sheet G486 [8]. c) A version in Turbo Pascal. Figure B.1 – Flow diagram for standard GERG-88 calculation method (xi = mole fraction of component i) |
| 21 | Figure B.2 – Flow diagram for computing intermediate data by iteration |
| 22 | Table B.1 – Values of the constants used in equation (B.1) (adjusted to conform with the molar masses and molar calorific values in ISO 6976:1975) |
| 24 | Table B.2 – Numerical values for the coefficients b(0), b(1) and b(2) in the temperature expansion of the second virial coeffici… |
| 25 | Figure B.3 – Flow diagram for compression factor calculation |
| 26 | Table B.3 – Numerical values of the coefficients c(0), c(1) and c(2) in the temperature expansion of the third virial coefficien… |
| 27 | NOTE The mass density can be calculated as follows: a) The input data shall satisfy the following condition: b) The intermediate calculated value for the mole fraction of nitrogen shall satisfy the following conditions: c) Furthermore, the internal consistency of the input data for the third iteration loop shall satisfy the condition: |
| 28 | Table C.1 – Input data Table C.2 – Results (Z-values) |
| 29 | Table D.1 – Nationally adopted metric reference conditions for the measurement of calorific value NOTE 1 In all countries the reference pressure is 101,325 kPa (= 1,013 25 bar). NOTE 2 t1 is the combustion reference temperature. NOTE 3 t2 is the gas-metering reference temperature. Table D.2 – Conversion factors for pressure and temperature |
| 30 | Table D.3 – Conversion factors for calorific value Table D.4 – Conversion factors for calorific value and relative density NOTE p = 1,015 60 bar = 14,73 psia (pressure customary in US). |
| 31 | Figure E.1 – Estimated uncertainty limits for the calculation of compression factors of natural gases with a high nitrogen content |
| 32 | Figure E.2 – Estimated uncertainty limits for the calculation of compression factors of natural gases with a high carbon dioxide content |
| 33 | Figure E.3 – Estimated uncertainty limits for the calculation of compression factors of natural gases with a high ethane content |
| 34 | Figure E.4 – Estimated uncertainty limits for the calculation of compression factors of natural gases with a high propane content |
| 40 | BS ISO 12213-3:1997 |
