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GB/T 30491.1-2014: Natural gas -- Calculation of thermodynamic properties -- Part l: Gas phase properties for transmission and distribution applications
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Natural gas -- Calculation of thermodynamic properties -- Part l: Gas phase properties for transmission and distribution applications
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GB/T 30491.1-2014
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Basic data | Standard ID | GB/T 30491.1-2014 (GB/T30491.1-2014) | | Description (Translated English) | Natural gas -- Calculation of thermodynamic properties -- Part l: Gas phase properties for transmission and distribution applications | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E24 | | Classification of International Standard | 75.060 | | Word Count Estimation | 43,488 | | Date of Issue | 2/19/2014 | | Date of Implementation | 6/1/2014 | | Quoted Standard | ISO 31-3; ISO 31-4; ISO 7504; ISO 12213-2; ISO 14532 | | Adopted Standard | ISO 20765-1-2005, IDT | | Regulation (derived from) | 2014 National Standards Bulletin No. 2 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard specifies the gas, calculated volume of gas containing artificial blend of nature and other similar mixture exists only in the gaseous state and thermal properties. This Standard applies to gas transmission and gas distribution process withi | GB/T 30491.1-2014: Natural gas -- Calculation of thermodynamic properties -- Part l: Gas phase properties for transmission and distribution applications
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Natural gas Calculation of thermodynamic properties Part l. Gas phase properties for transmission and distribution applications
ICS 75.060
E24
National Standards of People's Republic of China
Gas calculated thermodynamic properties
Part 1. Gas transmission and distribution gas properties
Part 1. Gasphasepropertiesfortransmissionanddistributionapplications
(ISO 20765-1.2005, IDT)
Issued on. 2014-02-19
2014-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
Thermodynamic Method 2 4
4.1 Principle 2
4.2 Helmholtz free energy basic equations 2
4.2.1 Overview 2
4.2.2 Helmholtz free energy 2
4.2.3 Helmholtz free energy of an ideal gas 3
4.2.4 residual Helmholtz free energy 3
4.2.5 Helmholtz free energy conversion 4
4.3 thermodynamic properties derived from the Helmholtz free energy 4
4.3.1 Overview 4
4.3.2 Thermodynamic Properties of Equation 5
5 Calculation Method 7
5.1 Input variables 7
5.2 pressure to convert density conversion 7
7 5.3 Operational
6 Applications 8
6.1 Pressure and temperature 8
6.2 pipeline gas 8
Uncertainty 7 9
7.1 Uncertainty gas 9
7.1.1 Uncertainty of methane 9
7.1.2 Gas Uncertainty 10
7.2 Effect of input variables Uncertainty 12
8 Results Report 12
Appendix A (normative) Symbols and units 14
Appendix B (normative) ideal gas Helmholtz free energy 17
Annex C (normative) Helmholtz free energy equation 20
A detailed presentation of Annex D (normative) equation of state of the 22
Annex E (informative) assigned minor component 28
Annex F (informative) calculation step 30
Annex G (informative) Example 32
References 39
Foreword
GB/T 30491 "to calculate the thermodynamic properties of natural gas" is divided into three parts.
--- Part 1. Gas transmission and distribution gas properties;
--- Part 2. extending the application of single-phase properties (gas, liquid and high-density fluid);
--- Part 3. Two-phase properties (gas-liquid equilibrium).
This section GB/T Part of 130,491.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This section uses the translation method identical with ISO 20765-1.2005 "Natural Gas calculated thermodynamic properties - Part 1. transmission and distribution of gas
Gas nature. "
Consistency correspondence between this part of international documents and normative references of our files are as follows.
--- GB 3102.3-1993 Quantities and units of mechanics (eqv ISO 31-3.1992);
--- GB 3102.4-1993 Thermal Quantities and units (eqv ISO 31-4.1992);
--- GB/T 14850-2008 gas analysis vocabulary (ISO 7504.2001, IDT);
Calculation (ISO of molar composition. --- GB/T 17747.2-2011 gas - Calculation of compression factor - Part 2
12213-2.2006, MOD);
--- GB/T 20604-2006 Natural Gas Vocabulary (ISO 14532.2001, IDT).
This part made the following editorial changes.
--- Appendix A symbol "E * nij" to "E * ij";
--- Appendix A symbol G * nij to G * ij.
This part of the National Gas Standardization Technical Committee (SAC/TC244) and focal points.
This section drafted by. China Southwest Oil & Gas Field Company Institute, China Petroleum Engineering Co., Ltd. West
South Branch, China Petroleum West-East Gas Pipeline Company, China PetroChina Southwest Oil and Gas Field Company safety and environmental protection supervision and Technology Research Institute.
The main drafters of this section. Han Hui, Luo Qin, Liu Jiahong, Tian Jing, Ming Chang States, Chang Hong Kong, Zhang Yuan, paragraph following the celery, Chen Yuhui, Huang Liming.
Gas calculated thermodynamic properties
Part 1. Gas transmission and distribution gas properties
1 Scope
This section GB/T 30491 provides for natural gas, including labor and other similar blends a mixture of gaseous state only memory
The nature and volume calculation method of thermal properties at the time of.
This section applies to Gas Transmission and Distribution process within a certain pressure (p) and temperature (T) range of the gas pipeline. For volume properties (pressure
Shrinkage factor and density), uncertainty calculations about ± 0.1% (95% confidence interval). For thermal properties [such as enthalpy, heat capacity, Joule - Thomson
(Joule-Thomson) coefficient, speed of sound], uncertainty calculations are usually larger.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including with amendments) apply to this document.
ISO 31-3 Quantities and units - Part 3. Mechanics (Quantitiesandunits-Part 3. Mechanics)
ISO 31-4 Quantities and units - Part 4. Thermal (Quantitiesandunits-Part 4. Heat)
ISO 7504 Gas analysis vocabulary (Gasanalysis-Vocabulary)
ISO 12213-2 natural gas - Calculation of compression factor - Part 2. calculation of molar composition (Naturalgas-Calculation
ofcompressionfactor-Part 2. Calculationusingmolar-compositionanalysis)
ISO 14532 Gas vocabulary (Naturalgas-Vocabulary)
3 Terms and Definitions
ISO 31-3, ISO 7504 and ISO 14532 define the following terms and definitions apply to this document.
Note. This section symbols and units given in the list in Appendix A.
3.1
Thermal properties caloricproperty
Characteristics can be calculated by the basic equation of state of gas or gas mixture homogeneous.
Note. This section applies to the thermal properties include the internal energy, enthalpy, entropy, isochoric heat capacity, isobaric heat capacity, Joule - Thomson coefficient, isentropic index and the speed of sound.
3.2
Equation of state equationofstate
The mathematical relationship homogeneous gas or gas mixture between the various state variables.
NOTE. Use this section need to distinguish between the two equations of state. That characterization of pressure, volume equation of state of the relationship between temperature and volume, characterization and density, temperature, and Hai Farm
Helmholtz (Helmholtz) free energy relationship between the basic equation of state.
3.3
The remaining properties residualproperty
Thermodynamic properties of non-ideal (real gas) gas or a homogenous mixture of gases produced by the state, that is at the same temperature and density conditions
An thermodynamic properties, the real gas or gas mixture or a mixture of the gas with the ideal state exists between the nature of the same species
difference.
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