Is the vortex flow meter related to pressure and temperature?
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The originally designed pressure for the steam delivered by our plant was 2.5 MPa, with a temperature of 280°C for the superheated steam; currently, the actual operating pressure is 0.5 MPa, with a temperature of 210°C for the superheated steam. The process indicates that the flow rate is too high; how should this be corrected? ,
If there is voltage stabilization compensation, no correction is needed; otherwise, the value must be calculated using a formula, or the operating temperature and pressure must be reset in the vortex flow meter – most flow meters allow for such adjustments. Standard-condition flow rate = Operating-condition flow rate * (Standard-condition pressure/Operating-condition pressure) * (Standard-condition temperature/Operating-condition temperature)
Does a vortex flow meter measure the differential pressure without the need for pressure stabilization compensation?
Wrong, doesn’t the vortex flow meter require compensation for the frequency it measures?
This post was last edited by qugd on 2017-12-19 at 13:40. If the differences in medium conditions are too large, the measurement error of the vortex flow meter will also increase. Before placing an order, it is generally necessary to use the specialized software provided by the instrument manufacturer for calculations. For saturated steam, it is generally sufficient to compensate for only one parameter, either temperature or pressure; however, for superheated steam, it is best to compensate for both temperature and pressure. The properties of superheated steam are far from those of ideal or real gases, as their thermal properties have a significant impact on them.
By determining the density at each temperature and pressure respectively, the actual flow rate M’ = M * √ρ’ / ρ
A vortex flow meter is a flow measurement device based on the Karman vortex principle; the frequency of the vortices is proportional to the flow velocity, which is why the vortex flow meter can measure volumetric flow rate. Whether compensation is required depends on the measurement unit needed; compensation is necessary if standard volumetric flow rate or mass flow rate is required, but it is not needed if only volumetric flow rate is sufficient. The methods of compensation can be: 1. External compensation is carried out within the DCS system, and temperature and pressure sensors are required ； 2. Some vortex flowmeters come equipped with temperature measurement; by setting the operating pressure, compensation can be performed directly within the vortex flowmeter itself.
If you use quality as the unit, there will be no accuracy without temperature and pressure compensation. Furthermore, if your operating conditions change so much, the volume measurement in units will also be inaccurate; it is necessary to adjust the internal settings of the vortex flow meter