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Natural Gas Measurement Error Analysis and Improvement


/ T13610 method prescribed standard gas should be selected by the State Quality and Technical Supervision passed the evaluation, a certificate and marked with the uncertainty of the standard gases, calibration gases shall not be less than accurate secondary standard gas (2.O %). When conditions permit conditions, should be formed to carry out gas-line analysis and determination of physical parameters of the line _3_. 2.6 throttling device with interchangeable orifice,[link widoczny dla zalogowanych], and constant throttle device, extended measuring range can be changed without orifice throttle device can be dismantled in the pipe or stop transmission case, easy to upgrade plate for inspection, cleaning or replacement, to ensure accurate measurement. Orifice flow meter measurement range is generally 3.5:1, while the actual working conditions are not in this range, once beyond the measurement range, will cause measurement errors. If you use a fixed value of the throttling device and the wide-range differential pressure transmitter, intelligent flow totalizer or flow supporting the use of a computer, can facilitate the realization of extension of range, differential pressure flow meter in order to achieve the traditional intelligence. At the same time, the use of constant throttle device conducive to product production, reduce production costs. Interchangeable orifice plate throttle device and set the value of matched products will achieve throttling device serialization and standardization help to improve the accuracy of measurement of throttling device 8.3 Conclusion of differential pressure flowmeter measurement error causes very complex,[link widoczny dla zalogowanych], difficult to carry out comprehensive quantitative analysis. Several key aspects of this only from the factors that caused the error were reviewed,[link widoczny dla zalogowanych], and proposed improvement measures. Objectively speaking, the introduction of larvae L plate flow meter gas flow, if the larvae an L plate flow meter device (orifice plate throttle device) and the secondary instrument (differential pressure, static pressure, temperature, measurement of physical parameters of natural gas equipment, etc.) supporting the choice of instruments,[link widoczny dla zalogowanych], design, installation, use strictly in accordance with relevant standards, revised in the course of time inconsistency, while strengthening the management and doing Flowmeter and maintenance, to strengthen the measurement of workers The professional quality training to eliminate measurement error is possible and can be flow measurement accuracy can be controlled at ± 1% ~ ± 1.5% range of [,. Orifice flowmeter recently focused on improvement of measurement systems to identify and eliminate errors on. GRI Research on the measurement pipe section upstream of metering orifice configuration on the accuracy of measurement done a lot of research on air conditioners also made the impact of extensive research. Air conditioner is installed in the flow upstream of a device for measuring the upstream pipe configuration to reduce any resulting negative effects. Orifice flowmeter future improvements may be by improving the secondary instrument system - pressure and temperature sensors and data acquisition and storage system to achieve. With the micro-sensors and micro-computer technology, further development of the pressure and temperature transmitters and data acquisition, storage and transmission systems will become more and more compact, more powerful, the price is cheaper. Measurement sensors and the collection, storage and transmission of data to accommodate all the electronic components integrated in a single module system in the next few years will become standard parts _9j9. In short, despite the increasing number of types of meter, but the orifice flowmeter will feature its mature technology and is widely used in natural gas measurement systems. Therefore, the majority of workers must be measured for experience in the work to continuously improve measurement accuracy, and promote the work of the continuous measurement of natural gas forward. References [1] Guo Xu Min, paragraph following the Qin, He Min. Gas metering system to improve and enhance the accuracy. Oil &, 2001,17 (: 14 [2] Chen Court. Differential pressure flowmeter in the flow measurement error analysis. ROLLING, 2002 (5) :30-33 [3] Wang. Guo Shumei, Shiraiwa. Differential pressure orifice flow meter of error sources and control measures. Natural Gas Industry, 2004,24 (10) :132-135 [4] Ming-set, yellow, and. Gas flow meter of the relative density. Natural gas and oil, 1996,14 (1): 5558 [5] SUN Wan chapter. Natural gas measurement error analysis. Oil and gas storage and transportation, 1995,14 (3) :35-40 [6] Liang Guangchuan,[link widoczny dla zalogowanych], Zong-Ming Yuan, Pu Aihua and so on. Natural gas transmission differential analysis of embryo asked. Natural Gas Industry, 1999. 19 (5) :70-75 [7] Wei Haibo. A standard orifice plate flow measurement to improve the accuracy of the method. Automation & Instrumentation. 2002. (4) :49-53 [8] JIANG Hong, Zhu Cong. Increases in gas flow measurement accuracy. Oil and gas storage and transportation, 1999.18 (10): 4042 [9] Zhao Chang will be translated, Ji Changjie proofreading. The twenty-first century, the natural gas flow measurement technology foresight. Foreign Oil Field Engineering. 2000,12.28-3O

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