Do you know how to improve the accuracy of gas turbine flow meters?

by:Kaidi Sensors     2022-04-20
Gas turbine flowmeter has the advantages of high sensitivity, good repeatability, wide range ratio and high precision, and has been widely used in natural gas trade settlement and measurement, and even as a standard instrument for value transmission. With the full development of my country's urban gas projects and the continuous improvement of the requirements for gas commercial trade and handover measurement, the gas turbine flowmeter has gradually become one of the instruments for my country's urban gas commercial trade and handover measurement. Turbine flowmeter is a kind of velocity flowmeter, which uses gas to drive the impeller of the flowmeter to rotate, and the speed of the impeller rotation is proportional to the volume flow of the fluid. The pulse signal proportional to the flow rate is calculated to obtain the volume flow rate. Its measurement accuracy is high, the accuracy level can reach 1.0, 1.5; the range ratio is wide, generally 1:20, the measurement range is wide; the structure is compact and lightweight, easy to install and maintain, and the requirements for the front and rear straight pipe sections are low, and can be used for medium and high pressure measurement .  The turbine flowmeter also has the following disadvantages: there are moving parts, which are easy to be damaged, the bearings of key parts are easy to wear, the anti-fouling ability is poor, the cleanliness of the medium is required, it is difficult to maintain the calibration characteristics for a long time, and regular calibration is required. The reasons for the error include: the quality of the meter itself, unreasonable design and selection, improper installation, improper maintenance during operation, etc.  How to control the error? Correctly determine the location and specifications of the flowmeter. Due to the existence of the turbine inertia of the turbine flowmeter, it is not suitable for use in occasions with frequent flow fluctuations, otherwise the measurement accuracy will be reduced. To more accurately estimate the peak and valley value of gas consumption and the pressure of the medium, correctly determine the specifications of the flowmeter. A filter must be installed before the gas turbine flowmeter; the filter should be kept unobstructed. If the filter is found to be blocked (it can be judged by the pressure difference between the inlet and outlet of the filter), the filter should be cleaned in time. Clean once a month. It is necessary to ensure the requirements of straight pipe sections, especially if there is a reduced diameter or half-open valve in front of the meter. During installation, the gasket shall not protrude into the pipeline, and there shall be no obvious deviation between the flowmeter and the axis of the pipeline, and no installation stress shall be generated. When installing, be sure to clean up all impurities in the pipeline to prevent the bearings and turbine from getting stuck. Now whether the above content has been helpful to you, pay attention to the editor, and share more flowmeter product knowledge with you. For more information, you can log in to Kaidi's official website for detailed inquiry.
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