How to set the range of a steam flow meter
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Measure a 0 using a vortex flow meter. For a steam flow rate of 6 MPA, the control range is 0–12,000 KG/H. What should be the measurement range for the flow rate? The unit for the flow meter is m3/H. Thank you
There’s a lot of work to be done. Does the flow meter have temperature and pressure compensation? I don’t think so, because what you’re measuring is whether it’s saturated steam or superheated steam. If you use an inexpensive vortex flow meter to measure steam, you can just generate some numbers; however, with a proper vortex flow meter, temperature compensation or pressure compensation – or both – should be applied, and this should be incorporated into the programs in the control system. Some central control programs come with them built-in. For superheated steam, both temperature and pressure compensation are required; calculations must still be done.
The range of the vortex flow meter is specified in the certification document provided by the manufacturer; it is determined based on the parameters set by the user, and should be consistent with the range indicated by the control system. In fact, the display unit of the control system is part of the vortex flow meter itself, and its parameter settings are those given by the manufacturer, namely 0–12000 kg/h, with kg/h being the unit for mass flow rate.
This one is quite tricky; it’s necessary to determine the density of the steam. If the temperature and pressure remain constant, then it’s simpler. But if these values change, the steam density also changes, and thus the range over which it can vary changes as well, making it impossible to set a value in such cases. The best approach is to switch to a vortex street flowmeter that directly generates high-quality flow data.