AGA 8 PART 1-2017 Thermodynamic Properties of Natural Gas and Related Gases DETAIL and GROSS Equations of State (Third Edition XQ1704-1).pdf
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1、 AGA Report No. 8 Thermodynamic Properties of Natural Gas and Related Gases DETAIL and GROSS Equations of State Third Edition April 2017 (A revision of AGA Report No. 8, 2nd edition, 1994) Prepared by Transmission Measurement Committee Part 1 AGA Report No. 8 Part 1 Thermodynamic Properties of Natur
2、al Gas and Related Gases DETAIL and GROSS Equations of State Prepared by Transmission Measurement Committee Third Edition April 2017 (A revision of AGA Report No. 8, 2nd edition,1994) Copyright 2017 American Gas Association All Rights Reserved Catalog No. XQ1704-1 ii iii DISCLAIMER AND COPYRIGHT The
3、 American Gas Associations (AGA) Operations and Engineering Section provides a forum for industry experts to bring their collective knowledge together to improve the state of the art in the areas of operating, engineering and technological aspects of producing, gathering, transporting, storing, dist
4、ributing, measuring and utilizing natural gas. Through its publications, of which this is one, AGA provides for the exchange of information within the natural gas industry and scientific, trade and governmental organizations. Many AGA publications are prepared or sponsored by an AGA Operations and E
5、ngineering Section technical committee. While AGA may administer the process, neither AGA nor the technical committee independently tests, evaluates or verifies the accuracy of any information or the soundness of any judgments contained therein. AGA disclaims liability for any personal injury, prope
6、rty or other damages of any nature whatsoever, whether special, indirect, consequential or compensatory, directly or indirectly resulting from the publication, use of or reliance on AGA publications. AGA makes no guaranty or warranty as to the accuracy and completeness of any information published t
7、herein. The information contained therein is provided on an “as is” basis and AGA makes no representations or warranties including any expressed or implied warranty of merchantability or fitness for a particular purpose. Nothing contained in this document should be viewed as an endorsement or disapp
8、roval of any particular manufacturer or product. In issuing and making this document available, AGA is not undertaking to render professional or other services for or on behalf of any person or entity. Nor is AGA undertaking to perform any duty owed by any person or entity to someone else. Anyone us
9、ing this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstances. AGA has no power, nor does it undertake, to police or enforce compliance with the contents o
10、f this document. Nor does AGA list, certify, test or inspect products, designs or installations for compliance with this document. Any certification or other statement of compliance is solely the responsibility of the certifier or maker of the statement. AGA does not take any position with respect t
11、o the validity of any patent rights asserted in connection with any items that are mentioned in or are the subject of AGA publications, and AGA disclaims liability for the infringement of any patent resulting from the use of or reliance on its publications. Users of these publications are expressly
12、advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. Users of this publication should consult applicable federal, state and local laws and regulations. AGA does not, through its publications, intend t
13、o urge action that is not in compliance with applicable laws, and its publications may not be construed as doing so. Information concerning safety risks, proper installation or use, performance or fitness or suitability for any purpose with respect to particular products or materials should be obtai
14、ned from the manufacturer or supplier of the material used. Changes to this document may become necessary from time to time. If changes are believed appropriate by any person or entity, such suggested changes should be communicated to AGA in writing and sent to: Operations full name of the document;
15、 suggested revisions to the text of the document; the rationale for the suggested revisions; and permission to use the suggested revisions in an amended publication of the document. Copyright 2017, American Gas Association, All Rights Reserved. iv v FOREWORD AGA Report No. 8, Part 1, is designated a
16、s the third edition of the revised 1994 second edition of AGA Report No. 8. As in the second edition, the third edition provides the technical information necessary to compute thermodynamic properties including compressibility factors and densities of natural gas and related gases for states in the
17、gas phase only. Additionally, equations for calculating speeds of sound and other thermodynamic properties are given. Historical information on this document is given in Section 1.2, Background. Analyses of the calculation of uncertainties are provided for various gas temperatures, pressures, and co
18、mpositions. It is based on research managed and sponsored by the then Gas Research Institute (GRI) in cooperation with AGA and the Groupe Europeen de Recherches Gazieres (GERG). Because the equations of state contained within International Standards Organization documents ISO 12213: Natural Gas Calc
19、ulation of Compression Factor, Part 2: Calculation Using Molar-Composition Analysis, 2006 edition, and ISO 20765: Natural Gas Calculation of Thermodynamic Properties, Part 1: Gas Phase Properties for Transmission and Distribution Applications, 2005 edition, are based on the same equations in this re
20、vision, calculated properties should have the same values. This revised edition, now designated as AGA Report No. 8, Part 1, uses the same DETAIL and GROSS equations of state as in the 1994 edition of AGA Report No. 8. However, the temperature, pressure, and gas composition limits have been modified
21、 in this edition; and therefore, it will be necessary to ensure that the temperature, pressure, and gas composition fall within the new limits for the desired uncertainty. The users are advised to verify the applicability/acceptability of the program for the new limits based on the 1994 edition of A
22、GA 8. The documentation of programs for calculating properties from the methods described in this document is available as supplementary material in Appendix C. Examples are available in Fortran, VB, and C+ code. The supplementary material also contains a Microsoft Excel spreadsheet for property cal
23、culations. This can be used to determine if, for a particular temperature, pressure, and composition, the property values calculated from the equations in Part 1 are within the desired uncertainty (by comparing with those in Part 2) even though one or more of these inputs may be outside the ranges g
24、iven in Part 1. A file containing calculated points at different compositions (not necessarily related to typical natural gas) is included, which can be used to verify that programs or equipment have been implemented or upgraded correctly to produce values that are in agreement with the equations in
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