Gas turbine flow meter is a kind of impeller-type velocity flow meter which is mainly used for measuring the flow medium. It has certain application in many fields. When users purchase gas turbine flowmeters, there are many problems that need to be considered. The accuracy, density, and flow range of gas turbine flowmeters are various issues that users need to pay attention to when selecting a type of gas turbine. There is a big connection. Selection considerations:
1, accuracy, etc.: In general, the choice of turbine flow meter is mainly to look at its high degree of roughness, but the higher the accuracy of the flow meter, the slower the changes in the field of application of the premise, so the rough degree of the instrument The summary is stable and should be considered from an economic perspective. With respect to commercial settlement instruments for large-diameter gas transmission pipelines, it is cost-effective to invest more in meters, and it is acceptable to use medium-precision standards for places with little shipments.
2. Flow range: The choice of turbine flowmeter flow size has a greater impact on its accuracy and useful life. Moreover, each type of flowmeter has an optional measurement domain. The choice of flowmeter caliber is also determined by the flow area. . The criteria for selecting the flow range is that the minimum flow rate for the duration should not be lower than the minimum flow rate that the meter is allowed to measure, and the maximum flow rate during use must not be higher than the maximum flow rate that the meter approves to measure. With regard to discontinuous work occasions where the daily instrumentation operation time does not exceed 8 hours, choose the reality to make the maximum flow rate of 1.3 times the upper limit of the flow rate; to deal with the day-to-day operation of the instrument, which is not less than 8 hours, select the real-world application 1.4 times the maximum flow rate as the upper limit of the flow category. The lower limit flow rate of the instrument is 0.8 times the theoretical minimum flow rate.
3. Density of Gas: For gas turbine meters, the effect of fluid properties is primarily on gas density, which has a large impact on the meter factor, and is primarily in low-traffic areas. If the gas density changes many times, the flow coefficient of the flowmeter should be corrected.
4. Pressure loss: Try to use a turbofan meter that loses pressure. As the fluid loss of the fluid turbine meter is reduced, the less energy the fluid loses from the input to the input pipeline, the less the required total power will be reduced, thereby making it possible to diversify energy sources and reduce transportation resources. , to improve the exercise rate.
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