Measuring Steam Mass Flow with Vortex Flowmeter

Use a vortex flowmeter to measure steam mass flow The vortex flowmeter is a volume flowmeter, that is, the fluid Reynolds number is within a certain range, and its output is only proportional to the volume flow. The output of the vortex flowmeter has two kinds of frequency signal and analog signal, and the analog output is obtained through VI conversion on the basis of the frequency output. This conversion will lose about 0.1^^ accuracy. Therefore, when used to measure steam flow, users prefer to use frequency output. Several other reasons why the frequency output vortex flowmeter is more popular with users such as heating companies are as follows. The price of the frequency output vortex flowmeter is slightly lower (non-intelligent type). It is more convenient to modify the full scale of the frequency output vortex flowmeter. It can be realized by simply operating the buttons on the panel of the programmable flow calculator according to the prescribed method. To calculate the steam mass flow rate from the frequency signal output by the frequency output vortex flowmeter, it is only necessary to know the current working condition of the fluid, and the temperature and pressure compensation of the analog output vortex flowmeter is only for the error caused by the deviation of the current working condition from the design working condition Therefore, it is not only necessary to know the current working conditions, but also to know the design working conditions. The data of the latter working conditions often cause errors due to the loss of data due to the passage of time or personnel changes. In contrast, the frequency output vortex flowmeter But there will be no such problem.

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