Leak detection of hydrogen–natural gas mixtures in pipes using the characteristics method of specified time intervals
This paper presents a technique for detection and location of leaks in a single pipe, by means of transient analysis, of hydrogen–natural gas mixtures flows. The method uses transient pressure waves initiated by the sudden closure of a downstream shut-off valve. The presence of a leak in a pipe part...
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| Veröffentlicht in: | Journal of loss prevention in the process industries 2010-09, Vol.23 (5), p.637-645 |
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| container_title | Journal of loss prevention in the process industries |
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| creator | Elaoud, Sami Hadj-Taïeb, Lamjed Hadj-Taïeb, Ezzeddine |
| description | This paper presents a technique for detection and location of leaks in a single pipe, by means of transient analysis, of hydrogen–natural gas mixtures flows. The method uses transient pressure waves initiated by the sudden closure of a downstream shut-off valve. The presence of a leak in a pipe partially reflects these pressure waves and allows for the location of the leak. Pressure waves are governed by two coupled non-linear, hyperbolic partial differential equations with pressure dependent coefficients. The fluid pressure and velocity are considered as two principal dependent variables. To determine the leak location, the mathematical formulation has been solved by the characteristics method of specified time intervals. The computed results describe the influence of the leak on pressure time-history and the effect of hydrogen mass fraction in the mixture on the leak discharge behaviour. It was found that transient pressure is much important in the case of hydrogen than that in the case of natural gas. |
| doi_str_mv | 10.1016/j.jlp.2010.06.015 |
| format | Article |
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The method uses transient pressure waves initiated by the sudden closure of a downstream shut-off valve. The presence of a leak in a pipe partially reflects these pressure waves and allows for the location of the leak. Pressure waves are governed by two coupled non-linear, hyperbolic partial differential equations with pressure dependent coefficients. The fluid pressure and velocity are considered as two principal dependent variables. To determine the leak location, the mathematical formulation has been solved by the characteristics method of specified time intervals. The computed results describe the influence of the leak on pressure time-history and the effect of hydrogen mass fraction in the mixture on the leak discharge behaviour. It was found that transient pressure is much important in the case of hydrogen than that in the case of natural gas.</description><identifier>ISSN: 0950-4230</identifier><identifier>EISSN: 1873-3352</identifier><identifier>DOI: 10.1016/j.jlp.2010.06.015</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Flow velocity ; Gas mixtures ; Hydrogen–natural gas mixtures ; Intervals ; Leak detection ; Leaks ; Leaks detection ; Loss control ; Mathematical analysis ; Mathematical models ; Method of characteristics ; Natural gas ; Pipe ; Pipes ; Position (location) ; Pressure ; Transient flow ; Transient pressures ; Valves</subject><ispartof>Journal of loss prevention in the process industries, 2010-09, Vol.23 (5), p.637-645</ispartof><rights>2010 Elsevier Ltd</rights><rights>Copyright Elsevier Science Ltd. 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The method uses transient pressure waves initiated by the sudden closure of a downstream shut-off valve. The presence of a leak in a pipe partially reflects these pressure waves and allows for the location of the leak. Pressure waves are governed by two coupled non-linear, hyperbolic partial differential equations with pressure dependent coefficients. The fluid pressure and velocity are considered as two principal dependent variables. To determine the leak location, the mathematical formulation has been solved by the characteristics method of specified time intervals. The computed results describe the influence of the leak on pressure time-history and the effect of hydrogen mass fraction in the mixture on the leak discharge behaviour. It was found that transient pressure is much important in the case of hydrogen than that in the case of natural gas.</description><subject>Flow velocity</subject><subject>Gas mixtures</subject><subject>Hydrogen–natural gas mixtures</subject><subject>Intervals</subject><subject>Leak detection</subject><subject>Leaks</subject><subject>Leaks detection</subject><subject>Loss control</subject><subject>Mathematical analysis</subject><subject>Mathematical models</subject><subject>Method of characteristics</subject><subject>Natural gas</subject><subject>Pipe</subject><subject>Pipes</subject><subject>Position (location)</subject><subject>Pressure</subject><subject>Transient flow</subject><subject>Transient pressures</subject><subject>Valves</subject><issn>0950-4230</issn><issn>1873-3352</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNp9kc9O3DAQxi1UJLaUB-jN4tJTlrEd5496qlBpkVbqBc6WY092HbJxsB1abn0H3rBPglfLqQdOMyP9vk8z8xHymcGaAauuhvUwzmsOeYZqDUyekBVralEIIfkHsoJWQlFyAWfkY4wDAKuhqVfk9wb1A7WY0CTnJ-p7unu2wW9x-vf3ZdJpCXqkWx3p3v3JA0bqJjq7OTdLdNOWph1Ss9NBm4TBxeRMZjHtvD2YxRmN6x1amtweszZDT3qMn8hpnwtevNVzcn_z_e76Z7H59eP2-tumMEJWqeBgLbdNa2tTVUJL23EuOjRt1QHomlmeOdFVGnupS806ZIJLw_taG4m6FOfky9F3Dv5xwZjU3kWD46gn9EtUTdmWTQlMZPLyP3LwS5jycqqWvISGtwc7doRM8DEG7NUc3F6HZ8VAHYJQg8pBqEMQCiqVg8iar0cN5jufHAYVjcPJoHUhf11Z795RvwIZSJRM</recordid><startdate>20100901</startdate><enddate>20100901</enddate><creator>Elaoud, Sami</creator><creator>Hadj-Taïeb, Lamjed</creator><creator>Hadj-Taïeb, Ezzeddine</creator><general>Elsevier Ltd</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TA</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20100901</creationdate><title>Leak detection of hydrogen–natural gas mixtures in pipes using the characteristics method of specified time intervals</title><author>Elaoud, Sami ; Hadj-Taïeb, Lamjed ; Hadj-Taïeb, Ezzeddine</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c356t-20dd2d89d7c663a5db223bec96b00a71d2c353b6aef5a4a1be1325c2f7ac5ea43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Flow velocity</topic><topic>Gas mixtures</topic><topic>Hydrogen–natural gas mixtures</topic><topic>Intervals</topic><topic>Leak detection</topic><topic>Leaks</topic><topic>Leaks detection</topic><topic>Loss control</topic><topic>Mathematical analysis</topic><topic>Mathematical models</topic><topic>Method of characteristics</topic><topic>Natural gas</topic><topic>Pipe</topic><topic>Pipes</topic><topic>Position (location)</topic><topic>Pressure</topic><topic>Transient flow</topic><topic>Transient pressures</topic><topic>Valves</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Elaoud, Sami</creatorcontrib><creatorcontrib>Hadj-Taïeb, Lamjed</creatorcontrib><creatorcontrib>Hadj-Taïeb, Ezzeddine</creatorcontrib><collection>CrossRef</collection><collection>Materials Business File</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of loss prevention in the process industries</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Elaoud, Sami</au><au>Hadj-Taïeb, Lamjed</au><au>Hadj-Taïeb, Ezzeddine</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Leak detection of hydrogen–natural gas mixtures in pipes using the characteristics method of specified time intervals</atitle><jtitle>Journal of loss prevention in the process industries</jtitle><date>2010-09-01</date><risdate>2010</risdate><volume>23</volume><issue>5</issue><spage>637</spage><epage>645</epage><pages>637-645</pages><issn>0950-4230</issn><eissn>1873-3352</eissn><abstract>This paper presents a technique for detection and location of leaks in a single pipe, by means of transient analysis, of hydrogen–natural gas mixtures flows. The method uses transient pressure waves initiated by the sudden closure of a downstream shut-off valve. The presence of a leak in a pipe partially reflects these pressure waves and allows for the location of the leak. Pressure waves are governed by two coupled non-linear, hyperbolic partial differential equations with pressure dependent coefficients. The fluid pressure and velocity are considered as two principal dependent variables. To determine the leak location, the mathematical formulation has been solved by the characteristics method of specified time intervals. The computed results describe the influence of the leak on pressure time-history and the effect of hydrogen mass fraction in the mixture on the leak discharge behaviour. It was found that transient pressure is much important in the case of hydrogen than that in the case of natural gas.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.jlp.2010.06.015</doi><tpages>9</tpages></addata></record> |
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| identifier | ISSN: 0950-4230 |
| ispartof | Journal of loss prevention in the process industries, 2010-09, Vol.23 (5), p.637-645 |
| issn | 0950-4230 1873-3352 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_849484013 |
| source | Elsevier ScienceDirect Journals Complete |
| subjects | Flow velocity Gas mixtures Hydrogen–natural gas mixtures Intervals Leak detection Leaks Leaks detection Loss control Mathematical analysis Mathematical models Method of characteristics Natural gas Pipe Pipes Position (location) Pressure Transient flow Transient pressures Valves |
| title | Leak detection of hydrogen–natural gas mixtures in pipes using the characteristics method of specified time intervals |
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