Objective As an important way to achieve energy measurement by obtaining the average heat value of natural gas,the study of performance evaluation methods for the cumulative sampling system is of great significance for ensuring the normal operation of the cumulative sampling system and obtaining representative samples.Methods According to the requirements of GB/T 13609-2017 Natural gas sampling guidelines and GB/T 30490-2014 The method for automatic sampling of natural gas,and combined with the on-site application of the cumulative sampling system,a performance evaluation method has been established,including the integrity of the sampling system configuration,compliance,airtightness and consistency of the sampling system,and compliance with preset parameters.Results Through specific evaluation experimental examples,it is verified that this performance evaluation method has good operability and adaptability.Conclusion The performance evaluation method of the cumulative sampling system can meet the current on-site usage needs.In the future,relevant method standards will be further established to provide standard guarantees for the promotion and implementation of natural gas energy metering.
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