Effect of evaporation on flow measurement The above two results obtained after evaporation occurs, the former has no effect on compensation, only the dry part of the steam increases, and the dryness increases accordingly.匸If after evaporation occurs, the steam becomes superheated, and the flowmeter happens to be installed on the pipeline after decompression. At this time, the impact on the flowmeter is divided into the following three situations. It has been considered in the design that the steam becomes superheated, or it is difficult to determine which state it is in, or sometimes it is superheated and sometimes saturated, so the temperature and pressure compensation is adopted, and the above phase change has no effect on the measurement results. Considering saturated steam when designing, and adopting pressure compensation, the above phase transition will bring about a small error, that is, the compensation error caused by the density difference corresponding to the difference between the superheated steam temperature and the saturation temperature. The design is based on saturated steam, but with temperature compensation, the superheated steam temperature is regarded as the saturation temperature to check the density table. Generally, large errors will be caused.
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