Reduction of methane emissions has been a topic of high interest in the gas industry. Several different methods for leak detection and emission measurement has been introduced in recent years with various methods. Gasum Oy, a Finnish gas transmission company, installed in 1997 to the compressor stations of the gas transmission network, a methane leak detection and emission measurement system, which utilises the existing station instrumentation, control and reporting systems. The method in this system, to detect the leaks and measure the emissions, is based on the pressure levels in the station pipework sections and the station valve statuses. When the station or unit is stopped the station or unit valves are closed and the pipework remain pressurised. Pressure levels are recorded and at the next time when the station or unit is started, the pressure drop is calculated and the methane emission from that pipework section is calculated and reported. The reported data is available for all operators in the dispatching centre and compressor stations' maintenance staff. The method is commonly known, but in Gasum's application, the whole system is automated for 3 different compressor stations having total of 9 compressor units. The experience until today shows a clear decrease of methane emissions from compressor stations due to better monitoring and as a consequence, due to the fast response to perform the corrective actions.


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    Title :

    A method for compressor stations' leak detection and methane emission monitoring


    Additional title:

    Eine Methode zur Detektion von Lecks bei Kompressorstationen und Überwachung der Methanemissionen


    Contributors:


    Publication date :

    2000


    Size :

    10 Seiten, 5 Bilder


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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